27 Dec '12, 4pm

Incandescent, CFLs, and LEDs … how do payback and lifecycle compare?

How much longer does an LED last than an incandescent or CFL light bulb? What is the payback period? Answer: Advice provided by: Claire Moloney, LEED Green Associate, Cornell University Share Lifetime of Incandescent Light Bulbs, CFLs and LEDs An average incandescent light bulb lasts between 1000 and 2000 hours, or about 42 to 84 days (if they are on 24 hours per day). Compact fluorescent light bulbs (CFLs) last about eight to fifteen times longer than incandescent light bulbs. ENERGY STAR rated CFL must have a rated lifetime of 6,000 hours or greater, though the average lifetime for an ENERGY STAR CFL is 10,000 hours. Light emitting diodes (LEDs) last between 25,000 and 100,000 hours. ENERGY STAR rated LEDs last 35 to 50 times longer than incandescent light bulbs and 2 to 5 times longer than fluorescent lighting. Payback Period of an LED The payback period of replacing an...

Full article: http://www.green-buildings.com/content/782623-leds-vs-cfl...

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