Select the optimal photometric distribution type for any lighting application. Covers road and area lighting (IESNA Type I-V), interior distributions (batwing, direct, diffuse), and high-bay patterns. Calculates recommended fixture spacing, uniformity ratio, and light trespass assessment from your mounting geometry.
Measurement units
Metric
Metres, lux
Imperial
Feet, foot-candles
Application context
Road / street
IESNA Type I-V
Parking / area
Type V / symmetric
Interior / office
Batwing / direct
High bay
Wide symmetric
Pathway / park
Type I-II
Sports / floodlight
Asymmetric flood
Installation geometry
Full width of road or area to be lit
Recommended distribution
Type III
Medium forward throw
0
W:H ratio
0
Uniformity U0
0
Avg lux (est.)
0
Spill zone (m)
Distribution selection
Polar intensity diagram — recommended vs alternatives
Distribution type options
IESNA distribution type reference — road lighting
TypeW:H ratioDescriptionBest for
Distribution selection guidance
Application context
Mounting geometry
Road/area width:height ratio
Recommended type
Expected uniformity
Light trespass zone
Pole arrangement
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