Sorry missed your second question. You have a volume close to 10 gallons, so recommend a Eheim Jagger 50W heater to raise temp 10F above ambient. With water heated it will help raise humidity and overall enclosure temp. Can experiment with ceramic emitter position until you find what is best for set-up and frog. Remember to place heater out of frog's reach.

If enclosure looks dark and for observation, think a longer lamp fixture like a fluorescent T8 or T5 is better than a single incandescent bulb. Can also use LED strips but those are more expensive initially with 36 in. fixtures running around $100 and up.