Brighten Your Day with Blues Buster! Rough Service Incandescent Like Sunlight In Your Home Brightness Light Output - 1100 Lumens Energy Used - 100 Watts Life - 5000 Hours Mercury Free - Fully Dimmable Estimated Energy Cost - $12.04 Per Year 1 Bulb (A21) - 120V For Indoor Use Only 5000 Hours GuaranteedUnlike ordinary bulbs - Blues Buster"s special glass filters out brown colors so even when it"s grey or dark outside - it"s like sunlight in your home!Blues Buster"s superior quality provides up to 5,000 hours of light - 6 times longer than ordinary bulbs!