A CFL is a type of fluorescent lamp compared to general service incandescent lamps giving the same amount of visible light, CFLs use less power and have a longer rated life. CFLs radiate a different light spectrum from that of incandescent lamps. Improved phosphor formulations have improved the subjective color of the light emitted by CFLs such that the best "soft white" CFLs available in 2007 were subjectively similar in color to standard incandescent lamps.
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