LED averages 2,000 hours at 3 hours per day. Smooth and continuous dimming with an electronic low voltage (ELV) or LED rated dimmer. 40-degree beam angle. Head is 4 1/2 high x 2 1/2 wide. Includes one dimmable 8.5 watt high-powered GU10 LED bulb: 680 lumen light output, comparable to a 75 watt incandescent. Clarke 5 Masonry Grinding Disc - Tools4Sale Charge Black Cylinder LED Track Head for Lightolier Systems - #84C37... Lightolier LLA0130WH Lytespan® Track Mount Small Cylinder Track Head Modern cylinder energy-efficient LED track head by Pro-Track Lighting. Pro Track Black 8.5 Watt LED Cylinder Lightolier System Track Head Perfect for modern studio ambiance, this cylinder-style 8.5 watt LED track head by Pro-Track lighting offers a sophisticated look as well as energy efficiency. A black finish die-cast aluminum construction with a clear 40 degree beam angles with a line voltage of 120V, and averages 25,000 hours of lifetime use at three hours per day. Line voltage - 120V. Mr16 Track Head Pro Track White 8.5 Watt LED Cylinder Lightolier System Track Head Mr16 Track Lighting