Downlight luminaire type D70-R155 G2 for Ceiling recessed mounting, Cut out 155mm, Diameter 168mm and height 78mm, LED light source , lumen out 3440lm, LED driver type HF: Non dimmable, colour temperature 4000 Kelvin, and CRI >80, reflector type SM - Silver matt reflector4000K, optic type SM - Silver matt reflector