Lighting Layout & Planning
Hallway Lighting Calculator
Determine fixture count, spacing, and lumen requirements for corridors and hallways. Choose a fixture type and application — the corridor diagram updates in real time.
Hallway Dimensions
Length  40 ft
Width  4.0 ft
Ceiling Height  9.0 ft
Lighting Target
Target Footcandles  10 fc
Fixture Type
Fixture Lumens  1200 lm
Top View — Corridor Plan
—
Fixtures
Required
—
ft spacing
Center to center
—
fc achieved
Average
—
W/sq ft
Est. LPD
IES RP-16 / ASHRAE
Residential5–10 fc
Commercial10–20 fc
Hospital10–30 fc
Emergency egress1 fc min
Your Result
Achieved fc—
Uniformity (est.)—
Spacing/MH ratio—
Spacing Rule of Thumb
Max spacing1.5 × MH
Edge offset0.5 × spacing
Uniformity target≥ 1:6 max/min
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.