I asked this in my last post..... with my new enclosure that's 4ftx2ftx2ft, will just 1 uvb bulb be enough?

while no expert...

I would say, that if worried you could always bump it up from say Repti Sun 5.0 to Repti Sun 10.0. But one bulb should be sufficient.

It all depends on placement and amount of plants/vines to obscure the light and such.

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Leonardo-Sambava-Male. Basil-Purple Bar Ambanja-Male

I use Repti Sun 5.0's on my 2x2x4 cages, with no problems. Your cham should be able to get within 6-8 inches from the uv source.

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He's only been moved in since yesterday. I have the light above where he's been hanging out the most. There's vines at different levels under the light.

It's a 5.0 bulb.

That's great. That's what I do. I provide different levels for them to bask, in both the uvb and the heat source.