In article , Steve Firth
wrote:
LEDs do not run cool. No form of lighting runs cool. HTH.
^
/#\
Available for the retail market,
at the moment, in sizes suitable
for domestic lighting.
And even then, it's really just
painfully expensive, not
impossibly expensive.
Electro-luminescent panels are on the market with output
efficiencies up in the 90s of %, and extremely low heat output per unit
of light. Heat outputs low enough that you can't notice them. But their
sizes are limited to hand-held computers, and limited colour
availability ("white" isn't particularly white).
Cold-cathode lamps have been used in LED screens for a good few
years now, and also produce negligible heat at significantly larger
sizes than ELs are available for. Still not big enough to be usable for
room lighting, but it's getting within reach. Look at the number of 15"
and 17" flat panel computer monitors and TVs being made, and think of
the volumes of lamp production that implies - putting a flat rectangle
of cold light on the wall is already an expensive, but credible, way of
providing in-fill or mood lighting.

Oh ****, I'd better not let the wife see that.

--
Aidan
Aberdeen, Scotland
Written at Mon, 20 Nov 2006 08:35 GMT, but posted later.