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Old 03-02-2015, 10:14 PM
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chuckinca chuckinca is offline
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Just bought 4 ea 40W CFL bulbs for about $4.50 that last 9 yrs at 3 hrs/day.

Math Question: which bulb(s) are less expensive for 10 years?

LED = $13 dollars assuming 12 hrs/day usage


CFL = 12 hrs/day usage makes life 9 yrs/4 = 2.25 yrs life for one x 4 bulbs = 9 yrs life for $4.50 PLUS additional energy cost by CFL bulbs.

might be a total push?

Incandescent bulbs last about .9 years/4 or about 3 months and cost about $2.50 each or $100 for the bulbs in 10 years plus 7 times the energy cost. $280 vs $40.

Time to retire the old bulbs!

.
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