Hank Roberts wrote:
> I suppose the same question applies to painting roofs white -- all the
> energy of making and applying the paint or new roofing material could
> be used differently too.
Sure, but at least the effect is free, whereas LEDs need powering...from
somewhere. I realise that this does not necessarily guarantee it's a
better alternative, but it's a pretty strong indicator. I also think it
is well established that white roofing is economically better than free
in areas where airconditioning is a significant cost.
> Heat that's already at the infrared level is mostly waste now, hard to
> scrape it up somehow into thermodynamically useful energy. Can a
> range of infrared be captured and used to emit in an IR window band?
My point exactly. All a bit moot in absence of any idea what is actually
being proposed.
James
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