25 Feb
2010
25 Feb
'10
1:10 a.m.
From: classiccmp at philpem.me.uk
Jules Richardson wrote:
Heating water one degree = 1 calorie per cu-centimeter
Heating Ice one degree = 80 calorie per cu-centimeter
Melting ice takes a lot of power.
Dwight
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I see quite a few incandescents up here in
northern MN still; it's
rumored that the harsh winters cause problems with the LED ones - they
just don't output enough heat, so snow and ice can build up and obscure
them.
... So put heaters in them to keep the lenses warm in winter! :)
(it only has to go a few degrees above zero... shouldn't take that much
power if it's on a time-limited thermostat)
--
Phil.