RAB, H17XXL, Lamp, Field Adjustable, Series: H17, H17XXL Designation, 300, 400, 500 W Wattage, 292.9 to 489.8 W Incandescent Equivalent, 120, 208, 240, 277 V, 4.00, 3.33, 2.50, 2.31, 1.92, 1.44, 2.00, 1.67, 1.25, 1.73, 1.44, 1.08 A, LED Lamp, High Bay Shape, 49020 to 79203 Lumens, 100000 hr Average Life, 81 to 84 CRI, 3000, 4000, 5000 K Color Temperature, 0 to 10 V Dimming Ballast, 16-9/16 in Dia x 12-1/16 in H Dimensions,