EarthTronics CF42SW1B 42-Watt 2700K Spiral Compact Florescent Light Bulb, Soft White Save money and the earth-this bulb only uses 42-Watts of power and outputs the equivalent light of a 150-Watts incandescent bulb Small, compact design, fits where standard bulbs are used 8000 hour average rated life means you'll almost never have to change bulbs Utilizes an advanced electronic ballast so the bulb reaches full brightness quickly 7 year limited warranty based on normal residential usage (3 hours average usage per day/7 days per week)