CFL twist and mini-twist light bulbs are a brilliant alternative to traditional incandescent or halogen bulbs. These CFLs last up to 10 times longer and use 75% less energy than incandescent light bulbs having the same light output. To help you find the right bulb for the right application, see Westinghouse?s full offering of CFL twist and mini-twist light bulbs available in a variety of colors including warm white, cool white and daylight. The CFLs with medium screw bases are compatible for use with many standard household fixtures--everything from recessed or track lighting to table lamps and porch lights. These light bulbs contain mercury. Dispose of according to local, state or federal laws.