This 3-way bulb is economical to purchase, and economic to use. When used in a 3-way socket, it will deliver three distinct levels of light. At its lowest setting the bulb will consume just 13 watts of electricity, producing an amount of light that is roughly equivalent to a 40 to 50 watt incandescent light bulb (700 lumens). At the middle setting the draw will be 20 watts of power, with the light produced equivalent to a 70 watt incandescent light bulb (1,150 lumens). On the highest setting 25 watts of electricity will be used, offering a light level similar to a 100 watt incandescent light bulb (1,600 lumens).
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.