Hey all,
Whites Tree Frogs need to be kept with nighttime temps around 68 to 72 degrees and daytime temps around 74 to 78 degrees.
depending on your tank or enclosure, you will have to determine how to keep those temps and also a humidity in the daytime around 60 percent.

WTFs don't need special lighting but we do recommend you have a daytime lamp to simulate daytime and night time cycles.
Using a compact florescent bulb around 24 watts will raise a non heated tanks temps by about 2 - 4 degrees depending on depth of tank and how far the light is off the tanks top.
Under Tank Heating Pads are not required but if placed on one side of a tank will create a warm side and cooler side for the frogs. It can also bring up tank temps in a tank of your tank is in a cooler room in your house.

If your tank has live plants then lighting is a must and a color temp on the lighting should be around 6500K.

As for a staple food source, crickets no longer than the distance between the frogs eyes should be their main meal. The crickets should be dusted with a calcium supplement at least twice to three times a week and if your frog is a juvi then the three times a week minimum.

Earthworms would be a good treat for your frogs but not as a main source of nutrition. I have never been a fan of meal worm except for creatures that will chew up the meal first. That's not your frogs :-)

Hope some of this info helps.

Don