The Feit 40W twist ecobulb CFL natural daylight bulb is non-dimmable and will replace a 150-watt equivalent incandescent bulb. It produces a similar light output of 2800 lumens, uses 40 watts of electricity and up to 73 % less energy than a standard incandescent light bulb. This compact fluorescent light is ideal for general purpose lighting. Choose a dependable bulb for residential or commercial applications.