Light-emitting diode luminaires installed in the elevator cabin ceiling, walls, and floor to provide energy-efficient illumination meeting EN 81-20 minimum lux requirements and aesthetic design objectives.
Full Definition
EN 81-20 Section 8.17.1 requires a minimum illumination of 50 lux at 1 m above the cabin floor with at least two lamps connected so that a single lamp failure does not extinguish all lighting. LED technology delivers 80–130 lm/W (compared to 10–15 lm/W for incandescent), dramatically reducing cabin energy consumption. Cabin LED fixtures are available as panel lights, spot downlights, LED strips (integrated into false ceilings and cornices), and colour-changing RGB/RGBW systems controlled via DMX512 or DALI protocols. Correlated colour temperature (CCT) choices (2700K warm–6500K cool) and colour rendering index (CRI ≥80) affect passenger perception of cabin quality. Dimming capability allows reduced illumination during standby to cut energy use. LED drivers must be rated for the elevator vibration environment; electrolytic capacitor life in drivers is the primary limiting factor (typically 50,000 hours). Emergency LED modules with integral NiMH or LiFePO4 battery provide ≥1 hour backup at ≥5 lux per EN 81-20 emergency lighting requirements.
