Keystone Technologies, KT-SWLED45PS-4A-8CSA-VDIM-P, LED Stairwell Fixture, Built-in Ultrasonic Sensor, Series: XFit, 120 to 277 VAC, 45 W Fixture, LED Lamp, 124/125/126 Lumens/W Light Output, 50000 hr Average Life, 3500/4000/5000 K Color Temperature, >80 CRI, 0 to 10 V Dimming Ballast, Frosted Lens, 5490/5535/5580 Lumens, Ceiling/Wall Mounting, Steel Housing Material, White Housing Finish, 4 ft L x 4.9 in W x 5.6 in H Dimensions,