Jeez guys, give the guy a BreaK!

Hello,
You would need to have the UVB light positioned right above where the iguana is going to bask which is right next to the heat lamp or it will be ineffective and she can develop metabolic bone disease from lack of UVB. I would also move the structure to the far left of the cage so she has more room to move around under the light.
Hope that helps,

Manny