RAB, SMP2X4, Lighting, Field Adjustable, Series: SMP, 120, 208, 240, 277 V, 55 W Fixture, 0.49, 0.29, 0.26, 0.24 A, Mercury/UV-Free Lighting Technology, LED Lamp, 55 W Lamp, 110 Lumens/W Light Output, 50000 hr Average Life, 2700, 3000, 3500, 4000, 5000 K Color Temperature, 90 CRI, Class 2/Constant Current Ballast, Polycarbonate Lens, 6050 Lumens, Surface Mounting, Metal Housing Material, White Housing Finish, 47-1/4 in L x 23-7/16 in W x 15/16 in D Dimensions,