Goodlite G-20305 23-Watt CFL 100-watt Replacement 1600-Lumen T2 Spiral Light Bulb with Super Long 12,000 Hour Life, Super White 100-watt replacement uses only 23-watts Yearly Energy Cost only $2.90, Saving $87 Per Bulb life (Based Cost 0.115Khw 3 hours average usage per day) 10,000 hour average rated life 9.1 Years means you'll almost never have to change bulbs, 10 times more then Standard Incandescent Lamps Utilizes an advanced electronic ballast so the bulb reaches full brightness quickly 1600 lumens providing fresh energizing light, Energy Star qualified New T2 Technology Small, compact design, fits where standard bulbs are used, Each bulb Packed Individually in a Colored box with UPC bar code