Bulbrite CF18C/WW/DM 18W 120V Energy Wiser Dimmable Compact Fluorescent Coil T3 Bulb, Warm White Continuous smooth dimming down to 20 percent lumen output Lasts up to 8 times longer than incandescents (10,000 hours) Equivalent to a 75W incandescent IC (Integrated Circuit) based technology provides longer life when dimming compared to other CFLs Save up to 77 percent in energy costs