Square LED recessed ceiling luminaire C90-R - external DALI dimmable The modern LED recessed ceiling luminaire C90-R is designed for ceiling systems with visible and concealed mounting rails. The microprismatic cover with pyramid structure ensures a homogenous distribution of the light emitted directly downwards. The housing of the luminaire is made of white sheet steel, the surrounding frame is manufactured in one piece and is flush with the ceiling. - Suitable for use at workstations in accordance with EN 12464-1 - Protection class IP55 (room side) - Impact strength: IK06 - Suitable for use at workstations in accordance with EN 12464-1 - Delivery includes external control gear box DALI dimmable control gear - Light distribution: 100 % direct (symmetrical) - Color location tolerance (MacAdam): 3 - Average useful life (IEC 62717, Ta 25 °C): 100000 h L90B50 - Ambient temperature: - 25 °C to + 35 °C - Connection terminal: 5 x 2 x 2.5 mm² (plug-in terminal); standardized Linect interface