I am getting prices for the heating of the racks and cages I am going to build when I get back to the states and I have run into some questions..

I know the difference between an On/Off thermostat and a prorotional as far as the what and the how, what I don't get is why one is considered better over the other? I am going to be useing flex watt for most of my heating. I plan to run each rack's shelf as it's own unit vise wrapping one long strand of heat tape through the whole thing. I plan to plug every level into a power strip, then plug the power strip into a thermostat of some type. Here's in lies the delima..

What kind would be best for this application, I haven't done the math on how many watts each unit will run yet but just in general. Big Apple sells a proportional that will run 300w and an on/off that will run 1000w-- is there any real difference if the room it's self is climate controled? Which would be best if it was in a garage that could get cold in the winter (the boas would be my concern there, the corns and rats would just brummate).

Sorry this is so long but I am at an impass and the wife is looking for numbers to crunch. I can't complain, if she wasn't I would be doing all this what it would be too late!!

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