Upgrade your lighting with sunlite dimmable led bulbs. With a a19 standard shape and medium e26 base, they are an energy-efficient replacement for 40-watt incandescent while only using 6 watts of electricity. They are instant-on at full 540-lumen brightness. With an average life of 15000 hours, these long-life bulbs need to be replaced less often. The estimated annual energy cost is a low $0.72 based on 3 hr/day use at $0.11 per/kwh. These 2200 kelvin amber light bulbs provide a comforting warm glow that can be adjusted with a dimmer for perfect lighting. High color rendering index cri of 90 and a 220-degree beam angle. The half chrome design reflects the light back into its fixture, giving you the perfect amount of light with a glare-free resolution. Tested compatible dimmers: lutron dvelv-300p maelv-600 selv-300p