Model : MH/C 150W/637 Metal Halide Bulb Brand : Philips Size : 56 x 141 E27 Socket Brightness : 13,500 lumens Color Temperature : Warm White 3700k Color Accuracy Value (Ra) : 65 Lifespan : 10,000 Hours Metal Halide Bulbs Use E27 Screw Sockets Provide High Luminous Efficiency of 90 Lumens Per Watt c/w Efficiency In Saving Electricity More Worthwhile Because It Uses Fewer Light Bulbs But Provides The Same Brightness Designed With A Special Glass Rim. Can Be Used With Open Headlights Ballast Used BMH + Igniter for MH70 BSN + Ignitor for MH100 and MH150 Usage