Sylvania Super Saver Light Bulbs, CFL, Soft White

Light output: 450 lumens. Energy used: 9 watts. Life: 8000 hours. 40 watt replacement using only 9 watts. 120 volts. Energy efficient. Medium base adaptors included. Saves $48.00 in energy costs (over the life of the light bulb). Lasts 7 years. To save energy costs, find the bulb with the light output you need, then choose the one with the lowest watts. Made in China.