RAB, ARM, High Bay, Field Adjustable, 120 to 277 V, 127.7 to 271.2 W Fixture, 2.27 to 0.50 A, LED Lamp, 275 W Lamp, 139.3 to 161.9 Lumens/W Light Output, 100000 hr Average Life, 4000/5000 K Color Temperature, 83 to 86 CRI, Class 1 Constant Current/0 to 10 VDC Dimming Driver Ballast, Polycarbonate Lens, 20673 to 38786 Lumens, V-Hook Mounting, Aluminum Housing Material, 12-1/2 in H x 10 in W x 36 in L Dimensions,