Grey Tree Frog... changing his colour?

[charlamanda]

I have UV lighting above my terranium for the little guys and they spend most of the time on the top leaves in the terranium directly underneath it. I am only new to frogs myself, but I have never read anywhere (this forum or other sites) or been told personally that it is bad for them, but actually the contrary, that it is necessary. On top of the UV light, I also dust their crickets once a week in calcium powder and once a week in reptile vitamins, to ensure that they are getting all of their reqirements.

My little froggers stay under their light too. Here is a pic of one that squeezed between the strap and the glass under the light, sometimes 4-6 of them are under there at a time, looks uncomfortable. That "spot" in the pic is a frog, my camera sucks, but assure you it is a frog.LOL I also found, in our many boxes, another light for a small octagon tank I had been using for Baby. My late father use to breed fish and it was a light bulb he had used, but it gets hot. I set it up on the top back of the big tank over the meshing on an angle to help dissipate the heat. I also have their regular fluorescent light on too. I put a thermometer in the tank below the light so I could monitor the temp. I only turn it on during the day for several hours (about 8-10 hrs) and a group forms. I have 10 froglets in this tank and usually around 6 will sit under it most of the day. The bulb itself is 1" diameter and 4"-5" in length. It has a filament, is clear with a yellow/amber tint in the glass of the bulb.
Anyone have any ideas what kind of bulb it is and or if it is safe for the frogs?
I just assumed it was and they really enjoy the heat it emits.
As far as I know most household fluorescent bulbs do not emit UVA or UVB wavelengths, (those years of physics haven't really paid off yet LOL) and I am not so sure that it's a necessity for the frogs either. I believe if you give your frogs vitamin supplements, they are receiving the nutritional requirements of vitamin D and do not necessarily need the light for the D conversion, similarly with humans and Vit D in our milk.
Hopefully someone with some concrete info will let us know because I myself am not 100% sure about lighting and it's benefits or ill effects or even what kind I have or what is the best kind to have. UVA and or vs UVB or either or both, no clue!!