Meridian bright white 18w PL LED replacement light bulb (1-pack) is cool to the touch, long lasting and energy efficient, using only 11w of electricity compared to an 18w CFL bulb. This LED replacement bulb is a universal replacement for all D, Q and X base G24 series PL bulbs and provides a (4000K) bright white light. The shape of the bulb allows for use in more fixtures than the traditional CFL bulb. Designed for use in commercial, residential and general lighting. A ballast bypass is required when a ballast is present.