Trex 4 in x 4 in Deck Lighting Gravel Path Wired LED Composite Deck Post Cap Nail Guns saves time saves time ) 4 in Knob housing width (in provide beautiful light when on Trex DeckLighting is proud to feature Cree LEDs No bulbs to replace Use of Trex dimmer with these fixtures is recommended Use only with Trex transformers 7 year Manufacturer's Warranty covers the LED diodes and engine low voltage LED post cap light designed to fit Trex post sleeves Dimmable fixtures that provide a warm color temperature Use with the Trex LightHub system for quick and easy installation or use outdoor rated wire nuts and 18 gal outdoor wire Designed to disappear when off