Exo Terra 100 Gallon Flexarium??

[Pugwinkle]

I have a couple of questions.

I will be using a 100 gallon flexarium laid flat for my eastern box turtles. My concern is the lights. If I were to suspend the lights from my ceiling I would have to have the UVB light very close to the mesh or the animal would not really be getting any benefit from the UVB. Does the UVB penetrate the mesh? It seems like very small mesh.

Also, I need to have a heat bulb to give them a basking area of about 90 degrees. I was told not to use Halogen bulbs, why is that? What type of bulb would I use if not halogen?

Is it possible that the mesh would melt or start on fire? How far away from the screen should the heat bulb be to be safe? Can the lights (clamp lamp style) actually sit right on the mesh without fear of fire?

Thanks,
Denise