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Lighting Design Calculator

Lumen method (EN 12464-1 or IES Handbook). Interior room types are free — exterior/area lighting and EN 1838 emergency lighting checks are subscriber features.

AAJappsEngineering Calculation Report

Lighting Design Calculator

EN 12464-1, IES Handbook, EN 1838

Generated

For preliminary engineering use only — always verify results against project-specific standards and a qualified engineer's review before use in a real design.

Room & target

lux
m
m
m

Luminaire

lm

Emergency / escape lighting (EN 1838)

Subscriber
lux
lux

Lumen method result

Room Area80.0 m²
Room Index (K)1.78
Required Luminaires (N)23 (exact 22.73)
Achieved Illuminance (rounded N)506 lux

Emergency lighting check

EN 1838 Required Minimum1 lux (Ra ≥ 40 · 1 hour duration · 50% within 5s, 100% within 60s (≤2m wide routes; 0.5 lux over ≥half the width))
Max Uniformity Ratio40:1
Minimum Illuminance Check1.2 lux measured ✓
Uniformity Check12.50:1 measured ✓