This Earthmate bulb offers three levels of light when used in conjunction with a 3-way lamp socket switch. At it's lowest level it uses 12 watts of electricity, producing 700 lumens of light (a 50w incandescent equivalent). The middle setting will use 22 watts of electricity, producing 1500 lumens of light (a 75-100w incandescent equivalent). At its highest setting, it will use 33 watts of electricity, producing 2225 lumens of light (a 100-150w incandescent equivalent).
Note: This bulb may have reduced rated life in enclosed fixtures or emergency exit lights, and is not suitable in outdoor locations where it would be exposed to the elements, or in conjunction with dimmers, photocells, or electronic timers. This lamp contains mercury. Please recycle at the end of its life.