Ok....you can use an red bulb and be fine as long as you keep checking to ensure the temps are ok. The only concern is how hot the hide gets. Also it will suck you humidity and checking the temps w the light is ....well....it just will make ya crazy.
I started with lights.....however we have switched everything to racks. I used heat tape...and bought thermostats. For me....I bought herpstats. This is much much easier than doing what you are curently doing. You can also keep the viv and put the UTH or heat tape under the tank with a thermostat. Trust me afterwards....you will be so happy.