WSJ article on recent legislation on light bulbsDecember 15, 2011
Turns out, changing a light bulb is harder than it seems.
New bulbs using halogen, compact-fluorescent and LED technologies have been sprouting up on store shelves recently. The flurry of products is a result of legislation passed in 2007 that requires general-purpose bulbs, starting in January, to be at least 25% more efficient than those using standard incandescent technology invented by Thomas Edison in 1879.
As a result, most of today’s incandescent bulbs will be phased out (some specialty bulbs are exempt) by 2014 and replaced by more efficient alternatives. While cheap at 25 to 50 cents a pop, incandescent bulbs waste nearly all their energy in heat output.
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