3 random dimensions...
But i can give some pointers.
UVB should run the length of the cage.
1 UVB bulb per 24" of depth. So if you have a 24x24 top, it will be 1 bulb, but if you have a 3 foot or 4 foot deep cage, it would be better to have a bulb spaced out every foot. 2 bulbs for 3ft, and 2-3 bulbs for a 4ft depending on the setup. All these recommendations are based on a single reflector hood.
As far as height thats a bit tricker. If the cham will be hanging out 6-24" away from the bulb, a 6%/5.0 T5HO is great. However if its something like a 6-7ft tall cage, It would be better to get a 12%/10.0, and keep the cham 18-36" away from the bulb, you dont want them much closer than 18", unless you have a meter that proves the cham is hanging out and getting less than 4.0 UVI.
"generally" you are going to need more light than just the UVB bulb. At this point i would just go with a few 6500k "grow" lights to keep the plants happy vs more t5ho 6500k bulbs, and 1 or 2 basking zoned made of halogen wide flood bulbs of appropriate wattage to get the little guys in the lower 90f's.
https://www.amazon.com/Sunblaster-904296-NanoTech-Fixture-Reflector/dp/B00AKKUBDQ
And an led discussion
https://www.chameleonforums.com/threads/sansi-grow-lights-are-on-sale-for-amazon-prime-day.170263/