A retail space needs around 400 lux – enough to make products stand out, not so much that the room feels like a warehouse. In practice: 30 m² → 6 cells (144 W), 50 m² → 10 cells (240 W), 80 m² → 15 cells (360 W).
Colour temperature by product: for clothing and cosmetics, 4000 K renders colours most naturally; for electronics and tools, 6500 K gives a crisper look.
The shape follows the floor plan: cells can be packed tighter over a display or the till and spaced out along an aisle. The same system also runs as a straight line above a shop window.
A 50 m² shop draws 240 W – about €112 a year at ten opening hours. 50,000-hour lifespan.
Calculate your own retail space
