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Re: [Phys-l] Interesting LED Light Effect- Reality Check Request


On 2011, Jun 24, , at 09:21, Paul Nord wrote:

Here's a reality check.

Why would anyone buy LED bulbs? They're much LESS efficient than CFL's.

GE LED:
2.8 W, 80 lumens, 12,000 hour life

GE CFL:
15 W, 740 lumens, 8,000 hour life

Nearly 10x the light output for only 5x power. The CFL is roughly twice as efficient as the LED.

Pa


Because, some LEDs's P/S are E-M cells, *** and our others are reading lites where a few watts does as well as a 15Wer.


*** True there are some fluorescents powered by a batt., but are specialist and rather expensive, e.g. camping lite.


bc