[JERRY2KONE]

Wouldn't it be easier to hook up a few hair dryers or hair curling irons that can draw like 1000 to 3000 watts each. I know you would have to do several cells at once to get enough voltage, but 250 bulbs sounds like too much work to get setup. Or maybe some other kind of heating coils that would easily draw enough amps to get 75C without having to build a small city of lights. Maybe some 12volt block heaters, or a 12volt motor with some kind of load in it. Maybe a compressor, or a generator. Then just apply a clamp on amp meter to measure the exact power draw.