Researchers tout advances in development of pure white LEDs

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dv @ Sep 26th 2007 5:05PM

unplugging unused wallwarts/surge protectors for environmental reasons is utter crap.

in ideal theory, a transformer does not consume energy and only converts energy. in the non-ideal and realistic world, transformers operate with >95% efficiency and emit only a tiny amount of heat compared to the amount of power they convert. if nothing is even consuming power, a realistic real-world transformer consumes only a small fraction of a watt.

just to show you the math, if a plugged but unused wallwart is emitting 0.5W of heat (a very realistic number), unplugging the wallwart for 24 hours saves the same amount of energy as an average single electric stove plate consumes in 30 seconds, or that a car consumes in less than a second.

hence, don't be penny-wise and pound-foolish; there are better ways to save energy than unplugging wallwarts.

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