Calculate Glare Rating (GR) for sports and outdoor lighting, Threshold Increment (TI) for road lighting disability glare, and veiling luminance for any combination of glare sources. Covers CIE 112 (GR), EN 13201 (TI), and disability glare assessment.
Measurement units
Metric
Metres, lux, cd/m2
Imperial
Feet, foot-candles
Glare metric
GR — Glare Rating
CIE 112 / Sports lighting
TI — Threshold Increment
EN 13201 / Road lighting
Disability Glare
Veiling luminance / Lv
Observer position and scene
Road: ~1 cd/m²; Sports field: 0.3-5 cd/m²
Enter lux (metric) or foot-candles (imperial)
Application / space type
Glare sources (luminaires)
Luminaire description
Cd (intensity)
Dist (m)
Angle (°)
Please add at least one luminaire and enter background luminance.
100
Calculator #ffeeee of 124 — milestone reached
Glare Rating (GR)
0
Compliant
GR scale — glare comfort to intolerable
10203040506070+
Your result
Limit
0
Lv total (cd/m²)
0
Background Lb
0
Glare limit
0
Sources
Glare source geometry — observer and luminaire angles
Luminaire contribution — veiling luminance per source
LuminaireE_eye (lux)θ (°)Lv (cd/m²)
Calculation breakdown
GR / TI limits by application (CIE 112 / EN 13201)
ApplicationGR limitTI limitStatus
Reducing glare — design measures
Metric calculated
Result
Limit
Total veiling luminance Lv
Background luminance Lb
Formula
Compliance margin
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