Philips Quartz Metal Halide Lamp, Standard, MH150/U/M 12PK, 150 W, 110 VAC, 1.5 A, BD17 Lamp, E26 Medium Single Contact Lamp Base, Elliptical/Dimple, 8775 Mean Lumens, 10000 hr Average Life, White, 65 CRI, 4000 K Color, Clear Lamp, Switch Start, M57/E Ballast, Enclosed Fixture, 2.125 in Dia x 5.438 in L