How do you heat a terrarium during the day (lights are not enough)

[chris_todd]

I'm setting up a couple of terraria using fish tanks, in which I plan to grow lowland tropical orchids and carnivorous plants. In the one I've setup so far, the temp stays pretty constant at room temp (68*F) - that is, the lights do not increase the tank temp (I guess I got lights that are too efficient, LOL - a 2x24W T5HO with good reflectors).

Does anyone else here need to heat your terraria during the day, and if so, how do you do it? An aquarium heater in a tray of water, or perhaps one of those heating pads for lizards? Any other suggestions?

[Erce]

if you use the aqarium heater in water you also get high humanity so thats a win win... but the lizzardmatt are also a good choise.
But remember you need some kind of crontroler so it dosent get to hot