LED2020 LED Vintage Filament Bulb, ST21 Edison Style, 4W to Replace 40W Incandescent Bulb, Super Warm White (2400K), 120VAC, E26 Medium Base, Not Dimmable Average life 25000 hours effectively reduces frequency of changing light bulbs Three-year warranty to guarantee the product quality Instant on without delay Super warm white (2400K) Clear LED light bulbs