I recently purchased some 4'x2'x15" AP cages. I got the 11" Flexwatt from them as well that measures 11"x20". My question is will this be sufficient to heat the cages? I currently have them hooked up to a Herpstat 4. My temperature is set at around 98F in one cage and 93.5F in another (I set them high last night to see if it would raise the cage temp. My snakes are NOT in there yet). Unfortunately the inside of the cages only have a small hot spot around 83/85F and to say I'm frustrated would be an understatement.

I am new with operating my enclosures with a thermostat and flexwatt so perhaps I'm missing something. Any advise or suggestions would be much appreciated.