HitLights 7 Watt UL-Listed MR16/GU10 Cool White LED Bulb - 20 Year Lifespan, Replaces 50 Watt - 5000K, 450 Lumens, 110 Volts Fully Dimmable to replacement bulb for a traditional 50W incandescent or Halogen bulb. Uses 90% less energy and lasts up to 50,000 hours For use in recessed and track lighting. Pays for itself within 2 years Estimated lifetime savings of 279.5 with a yearly energy cost of 1.00 (based on 3 hrs./day, 0.13/kWh) Instant on full brightness with little heat generation. Eco-friendly with no mercury or UV radiation High quality and brightness: 500 lumens. 5 year Warranty with lifetime over 10 years based on 3 hours a day. UL Listed, Energy Star Qualified Fully Dimmable to replacement bulb for a traditional 50W incandescent or Halogen bulb. Uses 90% less energy and lasts up to 50,000 hours For use in recessed and track lighting. Pays for itself within 2 years Estimated lifetime savings of 279.5 with a yearly energy cost of 1.00 (based on 3 hrs./day, 0.13/kWh) Instant on full brightness with little heat generation. Eco-friendly with no mercury or UV radiation High quality and brightness: 500 lumens. 5 year Warranty with lifetime over 10 years based on 3 hours a day. UL Listed, Energy Star Qualified Fully Dimmable to replacement bulb for a traditional 50W incandescent or Halogen bulb. Uses 90% less energy and lasts up to 50,000 hours For use in recessed and track lighting. Pays for itself within 2 years Estimated lifetime savings of 279.5 with a yearly energy cost of 1.00 (based on 3 hrs./day, 0.13/kWh) Instant on full brightness with little heat generation. Eco-friendly with no mercury or UV radiation High quality and brightness: 500 lumens. 5 year Warranty with lifetime over 10 years based on 3 hours a day. UL Listed, Energy Star Qualified