Brian --
Just a thought --- for anyone reading the thread. Here's my "thoughts" on heating with my lights -- or any other source that is ELECTRIC.... It takes "X" amount of "wattage" to heat "X" amount of space... so whether it's all electric lights - or lights and electric heater - or an oven for that matter... it's going to cost the same to keep the "temp" you want the shop. SO I just leave the lights on 24/7. An electrician explained to me how to use - or not use - my thermostat when we installed the A/C in the house. He told me - "the thermostat is not a gas pedal"! Set it and forget it... it takes a lot of energy to pull the house down to the set temperature - because it has to pull heat out of the walls/floors/furniture etc... once that gets to the temp you've set - it takes less to pull the ambient air down... OKAY == that made sense to me. It's also why I just leave the lights on - because that way all the metal stuff in the shop is nice and "warm"... once it's all warm - it helps keep the shop warm... and the lights can heat the "air" instead of all the cold metal (think about A LOT of metal - car bodies - frames - tools - tool boxes - work table etc)....
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