A compact fluorescent lamp (CFL) is an energy efficient alternative to incandescent lamps. They use 50 to 80 percent less electricity than incandescent bulbs, and are suitable for use in almost any lighting fixture, where you can use regular light bulbs. This includes recessed lighting, which is housed in a ceiling light that hides fixture.
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Select flood type lamp CFL bulb. These are the CFL bulbs most suitable for installation CAN lights. They produce less heat than other forms of CFL, which can be a problem in the concave bulbs. The meeting lumen bulb with CFL watts of incandescent bulb that you take from the concave light. Chart Packaging CFL will tell you the correct lumens.
Remove the existing light bulb in recessed lighting can. Screw CFL bulb in recessed light socket can turn the bulb clockwise until it is tight.
Leave off the lid of the concave light if there is one. Coverage of CFL bulb can cause it to overheat.