High Intensity Discharge (HID) Lamp, Metal Halide, 20 Watts, MR16 Lamp Shape, ANSI Number C156/M156, Lamp Designation CMH20MR16/830/SP12, U Operating Position, Universal Mounting Position, Description/Special Features Spot, UV Control, For Use With Open Or Enclosed Fixtures, Average Life 12K hr., Max. Overall Length 2-5/16 In., 1000 Initial Lumens, 3000 Color Temp., 81 CRI, GX10 Base, Open/Enclosed Fixture Type, Standards Meets 2012 Lighting Legislation Energy Standards