Lighting calculation
lux norms by room type → luminous flux and number of fixtures
Parameters
Utilization: 70–80% for light rooms, 50–60% for dark walls/ceilings. Reference: LED 9 W ≈ 800 lm, GU10 spot ≈ 400 lm, 5 m strip ≈ 1500–3000 lm.
Result
Fixtures needed
6
≈ 48,00 W LED total
Norm: 250 lx × 12 m²3 000,00 lm
With utilization loss4 286,00 lm
This is general ambient lighting. Task zones (countertop, desk, mirror) need local task lighting beyond the norm. More small fixtures beat one strong one — uniformity matters more than total flux.
About Lighting calculation
Lighting calculation — lux norms by room type → luminous flux and fixture count. build: . Use our tools without registration or installing software. All calculations happen in your browser — your data is never sent to a server.