Kichler Lighting 4056 Replacement Ballast has a G10Q base compatibility, and is compatible with a G10Q base 22W Circline CFL lamp, which is sold separately (not included). Compact fluorescent light bulbs use at least two-thirds less energy than standard incandescent bulbs to provide the same amount of light, and they last up to 10 times longer. Compact fluorescent light bulbs also generate 70 percent less heat, so they are safer to operate and can also reduce energy costs associated with cooling homes and offices. To save the most energy and money by using compact fluorescent light bulbs, the U.S. Environmental Protection Agency recommends replacing standard bulbs in areas where lights are used frequently and left on for a long time, such as family rooms, living rooms, kitchens, dining rooms, and porches. If used in an area where the fixtures are turned off and on frequently, a CFL will burn out considerable quicker than an incandescent. Consider where you are using it before purchasing a fluorescent fixture, or replacing an incandescent bulb with a CFL. Correct usage will enable you to get the most life and energy savings from your compact fluorescent lamp. 4056 comes one per package. Since 1938, Kichler Lighting has offered a distinctive array of lighting solutions that reflect your individual personality, tastes and plans. Kichler brings you an unparalleled variety of exciting style families, unique finishes, fresh colors and unequaled quality. Whether it’s casual, contemporary, transitional or traditional, you’ll find it with Kichler, lighting that defines your style.