I have my newly built cage and I'm about ready to put the flexwatt in and hook it up to the thermostats, but I was thinking...

I was told to have a different thermostat for the different size enclosures because they will become different temperatures and I've got a new opinion on it.

My three level cage has two equally sized cages on the top and two smaller ones on the bottom. On all three levels there will be an equally sized piece of flexwatt (the bottom level just has a divider to make two cages) I will be placing the probe for the thermostat directly on the heating element. The three levels should heat and cool at the same rate, therefore the three pieces of flexwatt should be the same temp. So the "belly temp" should be the same on all three levels (all four cages)

Now where I think there may be a difference in temps is ambient temp created by the flexwatt. I would think the smaller cages would be slightly higher ambient temps than the larger cages. However, if the difference in belly temps in all of the cages are equal, and the ambient temps vary, but only by a couple of degrees, then I don't see a reason to run them on more than one thermostat. Make sense?

I would think that simple rack systems with the flexwatt running vertically, the upper tubs would have a slightly higher ambient temp just because heat rises, am I correct? So a few degrees of ambient temp difference from larger and smaller cages shouldn't affect much.

This is my hypothesis, I will be conducting a test to find the results