Lighting calculators for design and planning
These calculators help with the numbers behind good lighting. They cover the basic quantities, such as lumens, lux, foot candles, candela, beam angle, and color temperature, and they turn them into practical answers, such as how many fixtures a room needs, how far apart to space them, and how bright a surface will be at a given distance.
You will also find tools for LED drivers and wiring, including voltage drop, transformer sizing, and junction box fill, along with energy and cost tools that compare LED with older lighting and estimate the savings from controls, sensors, and daylight. Other calculators serve stage and studio work, plant lighting, sports fields, and commercial spaces such as warehouses and hospitals.
Each calculator includes notes that explain the formula, the assumptions, and the points to check, so you can see how a result is worked out. Start with the target light level for the task, then find the lumens needed, and choose fixtures that deliver them with the right color and beam.
The results are estimates for planning. Real rooms have reflections, losses, and variations in the equipment, so confirm important designs with the manufacturer data, a photometric study, and the electrical code that applies to your project. Safety related work should be done or checked by a qualified professional.
⭐ Popular
Beam Angle CalculatorKnow the pool size you want and how far the fixture sits? Find the beam angle — the optic — you need to buy.Room Lumens CalculatorTotal lumens needed to light a room to a target illuminance.How Many Recessed Lights Do I Need?How many recessed lights do you need? The answer depends on your room size, ceiling height, and fixture output — but most rooms follow a simple spacing rule that…Lux at Distance CalculatorFind the illuminance on a surface from a point source using the inverse-square law.LED Driver CalculatorSize the correct LED driver for any application. Calculates required wattage, applies the 80% safety margin, checks thermal derating, and recommends dimming…Kitchen Lighting CalculatorDesign a complete layered kitchen lighting plan — ambient recessed, task under-cabinet, island pendants, and accent.
🔦 Photometry, Beam, Color & Units 64
Accent Lighting GuideAccent lighting draws the eye to a focal point — art, merchandise, architecture — by making it noticeably brighter than […]Beam Angle CalculatorKnow the pool size you want and how far the fixture sits? Find the beam angle — the optic — you need to buy.Beam Angle FormulaThe beam angle and the distance to the surface set how wide the lit circle is. The beam diameter grows […]Beam Angle ReferenceBeam angle describes how wide a fixture spreads its light. This reference groups the common categories from tight spots to […]Beam Distribution SelectorSelect the optimal photometric distribution type for any lighting application. Covers road and area lighting (IESNA Type I-V), interior distributions (batwing…Beam Spread CalculatorEnter a beam angle and throw distance to see how wide the beam lands — its diameter and lit area. Drag the sliders and watch the cone update.Candela CalculatorHome » Lighting CalculatorsCALCULATOR Candela measures luminous intensity — how much light a source throws in a given direction. Work […]Candela Distribution CalculatorThe total light a source emits in every direction — the size of the bucket of light.Candela to Lumens ConverterCandela and lumens aren't a fixed conversion — they're linked by how wide the beam is.CBCP CalculatorHome » Lighting CalculatorsCALCULATOR Center Beam Candlepower (CBCP) is the peak intensity at the middle of a beam, in candela. […]CBCP Comparison ChartCenter Beam Candlepower (CBCP) is the peak luminous intensity at the center of a beam, measured in candela. For the […]Color Temperature Comparison ChartCorrelated color temperature (CCT), measured in Kelvin, describes whether light looks warm or cool. Lower numbers are warmer; higher numbers […]Color Temperature GuideCRI measures how accurately a light source renders colors compared to natural daylight (CRI 100).CRI Reference ChartThe Color Rendering Index (CRI) rates how accurately a light source shows colors compared to natural light, on a scale […]CRI to TM-30 EstimatorCRI is a single average over 8 pastel samples; TM-30 measures fidelity (Rf) and gamut (Rg) across 99 samples plus per-hue shifts.Fixture Count EstimatorHow much total light does the room need? Calculates required lumens based on room size, activity level,Fixture Spacing GuideEven lighting depends on spacing fixtures relative to their mounting height. The spacing-to-height ratio (SHR) sets the maximum gap for […]Foot Candle CalculatorHome » Lighting CalculatorsCALCULATOR A foot-candle is one lumen falling on one square foot — the customary measure of illuminance […]Foot Candle FormulaA foot-candle is one lumen falling on one square foot. Divide the lumens by the area in square feet to […]Foot-Candles to Lux ConverterConvert illuminance from foot-candles to lux.Glare Rating CalculatorCalculate Glare Rating (GR) for sports and outdoor lighting, Threshold Increment (TI) for road lighting disability glare, and veiling luminance for any combination…How to Choose Color TemperatureColor temperature, measured in Kelvin, sets the mood and function of a space. Lower numbers look warm and cozy; higher […]How to Design Wall Wash LightingWall washing lights a vertical surface evenly from top to bottom, making walls feel bright and open. Good wall wash […]IES File ReaderAn IES file is a text-based photometric data file that describes exactly how a light fixture distributes light in three dimensions — every angle, every candela…Illuminance Uniformity CalculatorTwo rooms can report the same 500 lux average and feel completely different. The average says nothing about distribution — uniformity does.Inches to Millimeters ConverterConvert between inches and millimetres — fractions included — built for lighting hardware, optics, extrusions and CNC work, not just a number box.Inverse Square LawLight spreads as it travels, so illuminance falls off with the square of the distance from the source. Double the […]Kelvin Colour Temperature GuideFind the right colour temperature for any space. Enter a Kelvin value to see its appearance, recommended applications, and how it compares to every common light…Lens Material PropertiesLens choice affects how much light passes through, how the optic handles heat, and how long it stays clear. These […]Lighting Design FormulasA quick-reference sheet of the core lighting design formulas, with a link to a full explanation and worked example for […]Lighting Terminology FinderThe pairs people mix up most — with the one-line difference and the calculator that settles it.Lighting Units Converter — All-in-One☀ Illuminance 💡 Flux 🔦 Intensity 📐 Photometric ⚡ Efficacy 🔌 Electrical 📋 Reference ☀ Lux (lx) Light arriving atLumens by Lamp TypeWhen replacing a bulb, match lumens (brightness), not watts. This chart shows the typical light output of common lamp types […]Lumens FormulaLumens measure the total light a source puts out. To find the lumens needed for a space, multiply the target […]Lumens to Foot Candles CalculatorHome » Lighting CalculatorsCALCULATOR Enter the light output and the area to find how many foot-candles (and lux) land on […]Lumens to Lux ConverterConvert total lumens spread over an area into average illuminance (lux).Lumens to watts converterEstimate wattage from a lumen output and the source efficacy.Luminous Intensity FormulaLuminous intensity (candela) is the light emitted into a particular direction, measured per unit solid angle. Divide the lumens by […]Lux at Distance CalculatorFind the illuminance on a surface from a point source using the inverse-square law.Lux CalculatorHome » Lighting CalculatorsCALCULATOR Lux is the metric measure of illuminance — how much light lands on a surface, in […]Lux FormulaLux is light per unit area — one lumen spread over one square meter. Divide total lumens by the area […]Lux to foot-candles converterConvert illuminance from lux to foot-candles.MacAdam Ellipse ChartA MacAdam ellipse (measured in SDCM steps) describes how closely fixtures match each other in color. Fewer steps means more […]Meter to Feet ConverterMeters ↔ Feet Converter Instantly convert between meters and feet for lighting calculations, mounting heights, room dimensions,Mounting Height OptimizerLeave at 0 to auto-calculate recommended spacing.Natural vs artificial light balanceInstall dimmable fixtures on daylight zones. Set occupancy + photosensor dimming to reduce artificial output when windows provide adequate lux.Optic Selection CalculatorSelect the optimal beam angle optic for any fixture, mounting height, and target area.Optical Efficiency TableEvery optic — reflector, lens, diffuser, or louver — absorbs some light while shaping the beam. Optical efficiency is the […]Optical Loss CalculatorBuild a complete lumen loss budget for any LED luminaire — from driver input to delivered lumens on the target surface.Percent to Decimal CalculatorPercent ↔ Decimal Converter Convert between percentage and decimal form — used throughout lighting calculations for CU,Polar Plot GeneratorBuild and visualize IES-style polar intensity distribution curves. Enter candela values by angle, loadRecommended Foot Candle LevelsDifferent spaces and tasks need different light levels. This chart gives recommended foot-candle ranges for common environments. Space or task […]Recommended Lux LevelsLux targets for common spaces, aligned with international standards like EN 12464-1 and IES guidance. Space or task Recommended Corridors […]Reflectance Values ChartRoom surfaces bounce light around, so their reflectance affects how bright a space feels. These typical values feed the lumen […]Spot Lighting GuideSpotlighting uses narrow beams (generally 25 degrees or less) to put a concentrated pool of light on a specific target, […]TIR Lens CalculatorCalculate TIR (Total Internal Reflection) lens specifications — efficiency, critical angle, Fresnel losses, lens diameter, and working distance for any LED source…UGR CalculatorCalculate Unified Glare Rating (UGR) for any room and luminaire combination. Check compliance against EN 12464-1 limits for offices, classrooms, healthcare, and…Uniformity Ratio FormulaUniformity describes how evenly light is spread across a space. It is the minimum illuminance divided by the average (or […]Up/Down Light Ratio CalculatorCalculate illuminance on the task plane and ceiling from any luminaire up/down distribution ratio.Wall Wash Lighting CalculatorCalculate the fixture spacing, count, and vertical illuminance for wall washing or wall grazing any architectural surface.Watts to lumens converterEstimate lumen output from wattage and the source efficacy.What Are Foot CandlesA foot-candle (fc) is a unit of illuminance: one lumen of light falling on one square foot of surface. It […]What Is CRICRI, the Color Rendering Index, rates how accurately a light source shows colors compared with natural light, on a scale […]What Is LuxLux (lx) is the metric unit of illuminance: one lumen of light falling on one square meter of surface. It […]
⚡ LED, Drivers & Electrical 43
Calculate voltage drop for any lighting or electrical circuit. Checks NEC compliance, recommends correct wire size, and flags unsafe drops before you pull wire.0-10V Dimming Guide0-10V is a simple analog dimming standard: a low-voltage control signal tells the driver how bright to run, from 0 […]Bridgelux V SeriesThe Bridgelux V Series is an earlier generation of chip-on-board (COB) arrays, valued for solid output and value in general-purpose […]Bridgelux Vero SeriesThe Bridgelux Vero series is a widely used family of chip-on-board (COB) LED arrays found in directional and high-output fixtures […]Citizen COB LED GuideCitizen Electronics is a major chip-on-board (COB) LED maker, popular for spotlights, downlights, and track fixtures that need a compact, […]Constant Current Driver CalculatorDesign a constant current LED array, verify driver voltage window compatibility, calculate series/parallel string configuration, and check LED junction current and…Constant Voltage LED Strip CalculatorCalculate voltage drop, power injection points, and driver sizing for any constant voltage LED strip installation.DALI Dimming GuideDALI (Digital Addressable Lighting Interface) is a digital control protocol that lets you address, group, and monitor individual fixtures over […]Dimmer Compatibility CalculatorCheck whether your dimmer switch is compatible with your LED bulbs or drivers. Enter your LED load, dimmer type, and any symptoms you are experiencing — get a…Dimmer Load CalculatorCalculate how many LED fixtures your dimmer can safely support. Checks total load, derating, minimum load requirements, and dimmer-LED compatibility for residential…Driver Efficiency TableAn LED driver loses some power as heat. Its efficiency affects total system energy use and heat load. This chart […]Efficacy FormulaLuminous efficacy tells you how efficiently a light source turns electricity into light, in lumens per watt. Efficacy = Φ […]eldoLED Driver GuideeldoLED makes premium LED drivers known for deep, flicker-free dimming and broad control support, often used in architectural and broadcast […]Energy Consumption FormulaEnergy use is power multiplied by run time. Convert watt-hours to kilowatt-hours to match how utilities bill. kWh = (P […]Heat Sink Calculator for LEDsCalculate the required heatsink thermal resistance for any LED or LED array. Uses the full junction-to-ambient thermal resistance chain (Rth_jc + Rth_cs + Rth_sa)…Inventronics Driver GuideInventronics specializes in rugged, programmable LED drivers for outdoor, industrial, and high-reliability applications like street and area lighting. Series / […]Junction Box Fill CalculatorCalculate minimum junction box volume per NEC 314.16. Add all conductors, devices, clamps, and fittings to find the correct box size.LED Bin Matching CalculatorMacAdam ellipse uniformity check for LED arrays — CIE 1976 u’v’ colour space Reference LED (BinLED Driver CalculatorSize the correct LED driver for any application. Calculates required wattage, applies the 80% safety margin, checks thermal derating, and recommends dimming…LED Efficacy ComparisonLuminous efficacy — lumens per watt — is the clearest measure of how efficient a light source is. This chart […]LED Load CalculatorCalculate total electrical load from multiple LED fixture types — total watts, current draw, power factor, inrush current, and number of circuits required.LED Wattage CalculatorCalculate total system wattage, lumen output, and efficacy for LED lighting projects. Add multipleLighting circuit load calculatorCalculate how many lighting fixtures fit safely on a branch circuit. Checks NEC 80% continuous load rule, shows remaining capacity, and tells you exactly how many…Lighting Control Protocol ComparisonDimming and control protocols differ in how they signal fixtures and what they are best suited for. This chart compares […]Lighting Power Density CalculatorCalculate lighting power density (W/ft²) for a space and check it against ASHRAE 90.1 and IECC energy-code allowances.Linear Fixture Driver Loading CalculatorCalculate LED driver loading for linear fixture runs — LED strip, trunking, and continuous linear systems.Mean Well Driver GuideMean Well is a high-volume manufacturer offering a broad, value-focused catalog of LED drivers for nearly every application. Series Use […]Nichia LED PropertiesNichia is a Japanese manufacturer regarded as a benchmark for LED quality and reliability, having pioneered the practical white and […]Osram LED Propertiesams Osram is a major European LED maker with strong positions in high-power, automotive, and horticulture lighting through its Oslon […]Outdoor LED Strip Lighting CalculatorPlan your outdoor LED strip lighting installation. Calculate how many reels, power supplies, and controllers you need — with voltage drop analysis and power…Panel Schedule CalculatorBuild a complete panel schedule with phase balancing, load totals, and NEC compliance check.Power Factor CalculatorHome » Lighting CalculatorsCALCULATOR Power factor is real power (watts) divided by apparent power (volt-amps). Enter both to find the […]Power FormulaElectrical power is voltage times current. For AC loads, multiply by the power factor to get real power in watts. […]Power Supply Sizing CalculatorSize the right power supply for any LED lighting system. Enter your loads, output voltage, and installation environment -- get a recommended PSU wattage with safety…Samsung LED PropertiesSamsung is a leading LED maker known for high-efficacy mid-power packages, widely used in general lighting and horticulture. Property Detail […]Short Circuit Current CalculatorCalculate available short circuit current at the transformer secondary and at the end of a conductor run.Thermal Derating CalculatorCalculate derated LED output at elevated operating temperatures. Uses the LED datasheet derating curve to find actual current, lumen output, and power at any case…Thermal Load From Lighting CalculatorCalculate the heat generated by any lighting installation — in watts, BTU/hr, and tons of refrigeration.Transformer Sizing CalculatorSelect the correct transformer kVA rating for your lighting or electrical load. Enter all loads, apply demand and growth factors, and get a recommendation from…TRIAC Dimming GuideTRIAC dimming chops the AC line waveform to reduce power, the same phase-cut method used by classic wall dimmers. It […]Voltage Drop FormulaOn long wire runs, resistance causes the voltage to drop. This single-phase formula estimates the drop for a copper conductor. […]Voltage Drop TableVoltage drop on a lighting circuit depends on the wire gauge, the run length, and the current. This table gives […]Wire Ampacity TableLighting circuits must use wire rated for their current. This table focuses on the gauges used in fixture wiring and […]
🏢 Commercial, Industrial & Emergency 31
Car Showroom Lighting CalculatorDesign automotive showroom lighting that makes vehicles look stunning. Calculate ambient, accent, and feature lighting for every zone — from the showroom floor to…Classroom LightingSize lighting for K–12 and higher-education classrooms to IESNA RP-3 recommended levels.Classroom Lighting GuideClassroom lighting supports reading, screens, and board work while controlling glare and helping students stay attentive across a long day. […]Cleanroom Lighting CalculatorCalculate cleanroom lighting to ISO 14644-1 standards. Specify luminaire requirements for any ISO class — from ISO 8 controlled environments to ISO 3 ultra-clean…Cold Storage Lighting CalculatorAccount for temperature derating when sizing lighting for refrigerated warehouses, freezers, and coldCorridor LightingDesign lighting for hallways, corridors, and egress paths — fixture count, spacing, and required light levels.Data Centre Lighting CalculatorCalculate lighting for data centres and server rooms to ASHRAE, IES RP-24, and Uptime Institute Tier standards.Emergency Egress Lighting CalculatorCalculate emergency egress lighting to BS 5266-1, EN 1838, and NFPA 101 Life Safety Code.Emergency LightingCalculate emergency fixture spacing, battery runtime, and code compliance for means-of-egress lighting.Emergency Lighting Compliance CalculatorCheck if your emergency lighting meets NFPA 101 and IBC requirements for egress illumination. Calculates minimum foot-candle levels and battery backup compliance.Exit Sign CoverageCalculate exit-sign spacing and maximum viewing distance to meet egress code coverage for any space.Explosion Proof Lighting CalculatorDetermine the correct hazardous location fixture rating (NEC Class/Division/Group) for industrial environments withHigh Bay SpacingCalculate optimal fixture spacing for high bay warehouse and industrial lighting. Adjust inputsHospital and Medical Lighting CalculatorCalculate lighting for any healthcare zone to HTM 08-03, EN 12464-1, and ASHRAE/IES healthcare standards.Hospital LightingCalculate lighting for healthcare spaces to IESNA RP-29 — patient rooms, corridors, exam, and surgical areas.Hospital Lighting GuideHealthcare lighting spans many tasks, from soft patient-room ambiance to bright, high-CRI exam and procedure light, with infection-control and circadian […]Hotel Lobby Lighting CalculatorDesign hotel lobby lighting that creates an unforgettable first impression. Calculate layered lighting for every zone — from the arrival drop-off to the reception…Low Bay LightingSize LED low-bay fixtures for 12–25 ft ceilings — fixture count, spacing, and lumen output.Museum Lighting GuideMuseum and gallery lighting balances visibility against conservation. Light damages sensitive materials over time, so illuminance and cumulative exposure are […]Office Lighting DesignOffice lighting balances task visibility, visual comfort, and energy use. Modern guidance targets work-plane light levels with low glare and […]Office Lighting Design CalculatorDesign compliant office lighting to EN 12464-1 and ASHRAE 90.1 standards. Calculate fixture count, spacing, LPD, and uniformity for any office zone — from open plan…Parking Lot Lighting CalculatorDesign a compliant parking lot lighting system. Calculate pole count, spacing, fixture wattage, and energy costs — with IES RP-20 compliance check for your security…Recommended Office Lighting LevelsOffice lighting levels are set by the task: general work, screen use, meetings, and circulation each call for a different […]Recommended Warehouse Lighting LevelsWarehouse lighting levels depend on the task, from bulk storage to detailed packing. These targets balance visibility, safety, and energy […]Restaurant Lighting CalculatorDesign restaurant lighting that enhances the dining experience and makes food look irresistible.Retail Lighting CalculatorDesign a complete retail lighting scheme with ambient, accent, and feature layers.Retail Lighting DesignRetail lighting drives sales. It layers ambient, feature, and display light to draw the eye and render merchandise faithfully, with […]School and Classroom Lighting CalculatorDesign school and educational lighting to EN 12464-1 and BB93 standards. Calculate fixtures for any room type, verify uniformity and glare compliance, and plan…Warehouse Foot-Candle CalculatorHow many foot-candles does a warehouse need? Calculate the required illuminance, fixture count, andWarehouse Lighting CalculatorPlan warehouse lighting to IES RP-2 standards. Calculate high bay or low bay fixture count, bay-by-bay layout, aisle illuminance, and energy cost — for any…Warehouse Lighting GuideWarehouses need efficient, uniform light over large areas and tall racks, usually delivered by high-bay or low-bay LED fixtures with […]
🏠 Residential & Rooms 26
Bathroom Lighting CalculatorDesign a complete layered bathroom lighting scheme — ambient ceiling, vanity task, shower zone, and accent.Bedroom LightingDesign a layered bedroom lighting scheme: ambient, task (reading/vanity), and accent.Bedroom Lighting CalculatorDesign a complete layered lighting scheme for any bedroom. Get ambient, bedside, wardrobe, and accent recommendations with a scaled floor plan, dimmer circuits, and…Can Light Spacing CalculatorCan light spacing — space can lights apart by half the ceiling height. For an 8-foot ceiling, place lights 4 feet apart and 2 feet from the walls.Ceiling Fan Light CalculatorFind the right LED upgrade for your ceiling fan — compatibility check, dimmer warnings, smart-home conflict detection, and a personalised replacement spec.Ceiling Fixture SizeFind the ideal flush-mount ceiling fixture diameter for any room based on its length and width.Ceiling Fixture Size CalculatorFind the right ceiling fixture diameter, fixture type, and drop length for any room and ceiling height.Chandelier Size CalculatorGet the right chandelier diameter, hang height, and fixture size for any room — dining room, foyer, bedroom, or kitchen island.Circadian Lighting CalculatorCalculate melanopic equivalent daylight illuminance (mEDI) for any lighting scenario and check WELL Building Standard L07 circadian compliance.Cove Lighting CalculatorPlan cove lighting for a room — LED strip lumen output, mounting position, and spacing for a smooth, even ceiling wash.Hallway Lighting CalculatorLighting Layout & Planning Hallway Lighting Calculator Determine fixture count, spacing, and lumen requirements for corridors and hallways. Choose aHome Theater Bias Lighting CalculatorD65 calibration, display-type intelligence, TV geometry visualisation, and brightness ratio guidance. The enthusiast-grade bias lighting tool.How Bright Should Kitchen Lights Be?Kitchen lights need 300–500 lux for general ambient light and 500–800 lux at the worktop for food prep.How Many Lumens for a Garage?Aim for 50 lumens per square foot for general use, or 100 lumens per square foot for a workshop.How Many Recessed Lights Do I Need?How many recessed lights do you need? The answer depends on your room size, ceiling height, and fixture output — but most rooms follow a simple spacing rule that…Kitchen Lighting CalculatorDesign a complete layered kitchen lighting plan — ambient recessed, task under-cabinet, island pendants, and accent.Living Room Lighting CalculatorDesign a complete layered lighting scheme for any living room. Place furniture on the floor plan, choose your mood and fixtures, and get zone-by-zone lux targets…Pendant Light Height CalculatorCalculate the correct hang height for any pendant — kitchen island, dining table, or hallway. Live elevation preview, spacing layout, and expert sizing guidance.Picture Light Placement CalculatorFind the ideal position and angle for picture lights, track fixtures, or recessedRecessed lighting layout calculatorCalculate fixture count, spacing, beam spread, and coverage for any room. Choose your layout strategy, fixture size, and beam angle — then see the optimised floor…Residential Lighting DesignGood home lighting layers three roles — ambient (general), task (work surfaces), and accent (highlights) — and tunes brightness, color, […]Room Lumens CalculatorTotal lumens needed to light a room to a target illuminance.Stair Lighting CalculatorCalculate the right lighting for a staircase — step illumination, fixture spacing, and placement for safe, even coverage.Under-cabinet lighting calculatorDesign a complete under-cabinet lighting system for any kitchen. Place cabinets on the floor plan, choose strip type and mounting position, and get lux at counter…Vanity Light Size CalculatorFind the right vanity light width, mounting height, and lumen output for any bathroom.What Size Chandelier for a Dining Room?Add the room's length and width in feet — the total in inches is the right chandelier diameter. A 12×14 ft dining room needs roughly a 26-inch chandelier.
💰 Energy, Cost & Lifetime 21
Battery Runtime CalculatorCalculate how long a battery will power your LED lighting. Supports lead-acid, AGM, LiFePO4, and lithium-ion chemistries with depth-of-discharge limits, Peukert…Daylight Harvesting Savings CalculatorCalculate how much energy daylight harvesting photosensors will save by automatically dimming lights when natural daylight is available.L70 LED Lifetime CalculatorCalculate when an LED fixture will reach L70 (70% ofL70 Lifetime CalculatorTM-21 lumen maintenance projection from LM-80 test data — predicts L70, L80, and L90 lifetimes Test ConditionsLED payback period calculatorWork out how quickly an LED upgrade pays for itself — factoring purchase cost, energy savings, and replacement labour.LED Retrofit ROI CalculatorCalculate the full return on investment for an LED lighting upgrade - including energy savings, maintenance savings, and utility rebates.LED vs Halogen Cost Savings CalculatorCalculate exact energy and replacementLED vs Halogen Cost Savings CalculatorA typical home has 20–30 halogen downlights and spotlights. Here's what the switch to LED looks like:LED vs incandescent savings calculatorCompare LED and incandescent running costs to see your annual energy savings, based on bulb wattage, hours of use, and electricity rate.LED vs Incandescent vs CFL vs Halogen — Cost ComparisonLED vs incandescent vs fluorescent vs halogen — how do the four main bulb types compare?LED vs Incandescent vs CFL vs Halogen — Cost ComparisonHow many foot-candles does a warehouse need? Most warehouses require 20–30 foot-candles for general storage and picking aisles, and 30–50 foot-candles for packing…Lighting Carbon Footprint CalculatorCalculate the CO2 emissions reduction from your lighting upgrade. See the impact in tonnes of CO2, trees planted, car miles avoided, and more - based on your…Lighting electricity cost calculatorCompare your current lighting against a proposed upgrade — LED retrofit, more efficient fixtures, or reduced hours.Lighting Upgrade NPV CalculatorCalculate the Net Present Value and IRR of a lighting upgrade - the financial metrics used by CFOs and ESCOs to approve capital projects.Occupancy Sensor Savings CalculatorCalculate how much occupancy sensors will save based on your space's actual occupancy patterns throughout the day.Reflector Efficiency CalculatorCalculate the optical efficiency of any reflector design — from material reflectance and number of inter-reflections to aperture ratio and total lumen delivery.Smart Lighting Savings CalculatorCalculate how much you can save by adding smart lighting controls. Select the controls you plan to install and see the annual savings and payback period.Solar Lighting ROI CalculatorCompare the total cost of solar-powered lighting vs grid-connected lighting. Solar often wins when trenching costs are included - this calculator shows the real…Solar Lighting RuntimeSize solar panels and batteries for off-grid and solar-powered lighting systems. Enter load,Solar Lighting Runtime CalculatorSize a complete solar lighting system — panel wattage, battery capacity, and charge controller.Utility Rebate EstimatorEstimate the utility rebate available for your lighting upgrade. Rebates vary widely by state and utility - this tool gives you a realistic estimate to use when…
🌳 Outdoor & Landscape 18
Flood Light Coverage CalculatorCalculate how many flood lights you need to illuminate any outdoor area to your required light level.Highway Lighting CalculatorLighting Layout & Planning Hallway Lighting Calculator Determine fixture count, spacing, and lumen requirements for corridors and hallways. Choose aLandscape LightingPlan a low-voltage (12V) landscape lighting system — transformer size, fixture load, and wire voltage drop.Landscape Lighting CalculatorPlan your low-voltage landscape lighting system. Calculate voltage drop per wire run, transformer load, and wire gauge recommendations to ensure every fixture…Outdoor Area Lighting GuideOutdoor area and site lighting covers parking, walkways, entrances, and grounds. The goals are safe, uniform light with minimal glare […]Parking Area Pole SpacingCalculate the optimal light-pole placement grid for parking lots and large paved areas.Parking Area Pole Spacing CalculatorDesign the pole spacing layout for any parking area. Enter your car park dimensions and parking bay geometry, choose a pole configuration, and get a full layout…Parking Lot Lighting GuideParking lot lighting provides safe, uniform illumination with good uniformity and minimal light trespass and glare onto neighbors and the […]Path Light Spacing CalculatorCalculate the optimal spacing between path lights for any walkway, garden path, or driveway.Pole HeightDetermine the right pole height for outdoor area lighting based on the coverage and spacing you need.Pole Height CalculatorCalculate the optimal pole height for outdoor area lighting — or find the illuminance achieved at a known pole height and spacing.Roadway and Street Lighting CalculatorEN 13201, IES RP-8, and AS/NZS 1158 compliant street lighting design and energy analysis.Security LightingDesign perimeter and area security lighting to IES RP-33 — fixture count, spacing, and illuminance levels.Security Lighting CalculatorDesign security lighting for any protected zone — perimeter fence lines, entrance gates, parking areas, and building facades.Sport hall lighting calculatorDesign sports hall lighting to EN 12193 and IES RP-6 standards. Calculate fixtures for any sport and competition level — from recreational community use to TV…Sports LightingCalculate fixture count and lumen requirements for sports facilities. Select a sport, set yourSports Lighting GuideSports lighting must deliver high, uniform horizontal and vertical illuminance with controlled glare, scaled to the level of play and […]String Lights CalculatorCalculate how many string light strands you need for any space — patio, pergola, backyard, event tent, or wedding venue.
🎥 Photography, Film & Video 15
Cinematic Lighting PlannerPlan a complete cinematic lighting setup for any camera, lens, and scene. Calculates required lux for correct exposure, designs key/fill/back/hair/background light…CRI and TLCI Calculator for Photography and VideoAffiliate link - we may earn a small commission at no cost to youExposure & Lux CalculatorConvert between EV (Exposure Value), lux, foot-candles, and cameraExposure Value (EV) CalculatorCalculate Exposure Value (EV) from your camera settings — then instantly see every equivalent exposure combination.Green Screen Lighting CalculatorCalculate green screen (chroma key) lighting requirements for film and video production.Hyperfocal Distance CalculatorCalculate hyperfocal distance for any lens and aperture combination. Focus at the hyperfocal distance and everything from half that distance to infinity will be…LED Video Panel Comparison CalculatorCompare two LED video panels side by side across every key metric — output, efficiency, colour quality, and cost per lux.Lighting Gel Calculator — Colour Correction FiltersFind the right colour correction gel to match or shift your light source. Enter your source and target colour temperatures — or pick a common scenario — to get the…Lighting Ratio Calculator for Portrait PhotographyCalculate the exact fill light setting needed to achieve any lighting ratio — from flat editorial to dramatic fashion.Softbox Coverage and Light Quality CalculatorCalculate the light quality, shadow softness, and coverage area for any softbox or modifier.Softbox Coverage CalculatorCalculate the illuminated coverage area, soft light spread angle, and subject-to-sourceStudio Flash Power CalculatorCalculate the flash power needed to achieve your target aperture, or find what aperture a given strobe produces at any distance.Studio Lighting RatioCalculate key-to-fill lighting ratios for photography and film, with the resulting contrast shown in stops.Video Lighting CalculatorCalculate the exact illuminance your scene needs for correct video exposure — then get a complete three-point lighting plan with wattage per fixture.White Balance Calculator for Photography and VideoFind the correct white balance setting for your lights, calculate a mixed-source average, and see how scene appearance changes at different camera WB settings.
🌱 Horticulture & Grow Lights 10
COB vs Quantum Board LED Grow Light CalculatorCompare COB LED and quantum board LED grow lights side by side. Enter your specific fixtures or use the type defaults to see efficiency, heat output, coverage, and…DLI CalculatorCalculate Daily Light Integral (DLI) from your grow light's PPFD and photoperiod, or find what PPFD and hours you need to hit a target DLI for any crop.Greenhouse Lighting CalculatorCalculate supplemental lighting requirements for greenhouse growing. See month-by-month natural vs supplemental DLI and total fixture wattage needed to hit your…Grow Light Heat Output CalculatorCalculate how much heat your grow lights produce and what cooling capacity you need to maintain optimal grow room temperature.Grow Light Yield EstimatorEstimate indoor grow yield based on your light intensity, grow area, medium, and grow conditions.Grow Tent Sizing CalculatorFind the right LED wattage, plant count, and light placement for your grow tent. Select a preset size or enter your own dimensions.Lux to PPFD ConverterConvert lux readings to PPFD (µmol/m²/s) for grow light planning, or convert PPFD to lux.Plant Stage Light Hours CalculatorFind the optimal light hours and DLI for every stage of your plant's life cycle. Enter your PPFD to get exact photoperiod recommendations and electricity costs per…PPFD grow light calculatorEstimate PPFD and DLI for your grow light setup — in umol/m2/s and mol/m2/day.VPD Calculator for Grow RoomsCalculate VPD (Vapor Pressure Deficit) and see how it interacts with your light intensity.
🎛 Stage, Controls & DMX 7
DMX Address CalculatorCalculate DMX start addresses for every fixture in your rig. Add fixtures, set their channel count and quantity, and instantly get a complete patch list with…Fixture Configuration Builder1Family 2Size 3Optic 4Lumens 5CCT 6CRI 7Driver 8Finish 1 Fixture family Recessed downlightCeiling recessed can Surface mountCeiling disk / drumGobo Projection CalculatorCalculate the projected gobo size at any throw distance, or find what throw distance you need for a target projection size.Lighting Control Zone CalculatorPlan lighting control zones and check compliance with ASHRAE 90.1-2019 automatic control requirements.Moving Head Pan Tilt CalculatorCalculate the exact pan and tilt angles to point a moving head fixture at any position on stage.Stage Wash Coverage CalculatorCoverage area, overlap, and fixture count for stage wash lighting rigs Stage Dimensions Stage width (m)Throw Distance CalculatorCalculate throw distance from a spotlight, accent light, or stage fixture to achieve a target illuminance.