No problem

As I live in scotland the only US site I know is joshs frogs but if you look for dart frog stores they will usually sell plants.

They can be left on overnight and are less disturbing than normal bulbs but I've had mixed experiences with them, some animals won't come out until they're switched off. For 24 hour heat a ceramic heat emitter is probably best and if you want to then view the animal you could then use a low wattage red or purple bulb or led light for a few hours.