Model : 400W Self Ballast Metal Halide Lamp (BT Type) Brand : Stella Lamp Power : 400W Lamp Base : E40 Product Size : 24 x 10 x 10 cm Color Temperature : Cool Daylight (6,000k - 7,000k) Temperature : Over 300 Degree Celcius Rated Luminous Flux [lm] : 13000 Luminous Efficacy [lm/W] : 52 Color Rendering Index [Ra] : 41 Color Temperature [K] : 3900 Life Time [h] : 24000 Lamp Mercury Content [mg] : 39.0 Light Bulb Type : Halogen