T i m wrote:

Ulitimately of course *all* the energy ends up as heat.

What, even the stuff coming out as visible light / UV light?

Yes, of course, what else do you think happens to the energy?

Some of the light may go out of your windows and the resultant heat is
lost from your house but the light will be absorbed by the atmosphere
and disappated as heat there.

Ultimately a few photons worth of energy possibly escape into outer
space I suppose.

--
Chris Green
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