Re: how to keep temp up??
Use an under tank heater. If you still need a heat bulb to keep the ambient temp up use a water bowl with a larger surface area and put it near the heat that keeps the humidity up for me in the display tanks I have.
Re: how to keep temp up??
UTH all the way. Then a lamp can be used as an extra to keep the ambient temps up. Ceramic or red bulbs work well.
Re: how to keep temp up??
For ambient heat only, blue midnight bulbs are best, followed by red night and ceramic heat emitters. But lamps are only really to boost ambient temps.
For actual warm/basking side temps, use an under tank heater or flexwatt, and be sure to have them on a thermostat.