Lighting calculation

lux norms by room type → luminous flux and number of fixtures

Parameters

Room type

Area, m²

Lumens per fixture

Utilization factor, %

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

≈ 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.

Over Verlichtingsberekening

Verlichtingsberekening — lux-normen per ruimte → lichtstroom en aantal armatuur. build: . Gebruik onze tools zonder registratie of software-installatie. Alle berekeningen gebeuren in uw browser — uw gegevens worden nooit naar een server gestuurd.