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Comment Re:ROI (Score 1) 710

The bulb in TFA (I know, I know... but it wasn't in TFS) is rated 6.9w consumption, and is presumably the 60w-equivalent referenced in the summary. Most "60w" CFLs take around 12-15w if memory serves - so these LED bulbs are about twice as efficient. Save $23/yr for 19 years vs $12/yr for 5 years

If the consumption of a LED is half the consumption of a CFL, that doesn't mean you save twice as much per year. In the CFL case you save 45-50W-worth relative to an incandescent bulb and in the LED case you save 53.1W-worth. So you only save slightly more per year by using LED instead of CFL in terms of electricity consumption.

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