Item C77103498 - C77-S475x475 BL 5000 DALI 830 4xSM Mounting: Ceiling surface, Lightsource: LED, Ingress protection: 20, Impact rating: IK08, Shape: Rectangular,Square, Measurement:, Colour: BL - Black, RALkode: RAL 9005, Optical ID SM - Silver matt reflector, Light technical requirements-, CRI: >80, Colour temperature: 3000, Lumen out: 4928, Efficiency Lumen per Watt: 137, Median lifetime Ta25:, L80 100 000, Type LED driver DALI: Dimming.