Those sound like 40br and 55gal dimensions to me.
The UTHs aren't good for heating the air so supplementing with the bubs is a fine way to go. I would do one of several things:
1. Up the wattage of the bulbs by at least 25w and leave them on 24/7. Alternatively use a day/night cycle with 2 different bulbs on each tank.
2. Try using RHPs. I think AP sells RHPs, and I know reptile basics definitely sells them. Although mounting these will be tricky w/o drilling the glass IMO. And they would also negate needing a UTH.
3. I just noticed you live in FL. You could just open a window in that room and block it off from the rest of the house. ;-)
You are using the thermostat right?