I use ceramic heat lamps on my tortoises but the shield gets very, VERY hot and I would never use it on a terrarium. When I got my frogs I bought several different size regular light bulbs and tried different ones until the small inexpensive thermometer in the tank registered the temperature I wanted (75 - 78 deg.) When we had the cold, windy blizzard I wrapped heat tape (flex-tape) on two sides of the dumpy tank glass. Didn't look pretty but it works and the dumpy frog moves from warm to cool as he prefers. The tiger-legged TF has a small piece of heat tape on the glass behind his favorite sleeping plant. I use a 40 watt light bulb on top the screen in the day time. The bombina get a aquarium light in hood over tank. No UV bulbs, please. All lights are turned off at night. Hint: I prowl the local reptile store's bargain bin for heat lamps, heat tapes, bowls, etc. and pick up extre pieces of things I may need. Don't be a hoarder, but be selective. Always test to make sure electrical works before buying. Garage sales and Craig's List often list heaters, bigger tanks, hoods and so forth.