Retail Lighting Calculator

Design a complete retail lighting scheme with ambient, accent, and feature layers. Calculate fixture counts for each zone, verify accent ratios, and get colour temperature recommendations by retail sector.

Measurement units
Metric
Metres, m2
Imperial
Feet, sq ft
Retail sector — sets lux targets and CCT recommendations
Fashion / clothing
500-750 lux ambient
3000-4000K, CRI 90+
Food / grocery
750-1000 lux ambient
2700-3000K, CRI 90+
Jewellery / luxury
500-750 lux ambient
3000-4000K, CRI 95+
Electronics / tech
500 lux ambient
4000-5000K, CRI 80+
Pharmacy / health
500-750 lux
4000-5000K, CRI 85+
General merchandise
300-500 lux
3500-4000K, CRI 80+
Store dimensions
For vertical illuminance calculation
Ambient lighting (base layer)
Accent lighting (display layer)

Please enter store dimensions and luminaire lumens.

Total fixtures (ambient + accent)
0 fixtures
0
Ambient lux
0
Accent lux (spot)
0:1
Actual ratio
0W
Total load
Ambient layer — general illumination
0
Fixtures
0
Avg lux
0W
Total watts
Accent layer — display and merchandise
0
Spotlights
0
Spot lux
0W
Total watts
Feature layer — hero displays and windows
0
Target lux (window)
4-8
Suggest fixtures
3000K
Rec. CCT
Store plan — ambient and accent layout
Colour temperature and CRI recommendations
Store area
Retail sector
Ambient fixtures
Accent spotlights
Achieved accent ratio
Total installed load
LPD (W/m2)
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The calculators and tools on LightingCalc.lighting 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. LightingCalc.lighting 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.