What is the best thing to help iguanas grow?

I honestly believe that its all in the temperature, lighting, food, and space. temp should never be below room temp, use UVa and UVb lighting it has all the chemicals that the sun produces. only 70 percent of the diet should be greens. the rest should be grated squash, carrots, green beans, and dandilions and dandi lion greens are great. fresh food is the best for even the pickiest iguana. dont give them frozen veggies, freeezing will deplenish the nutrients. and heres something that some people dont know. UV rays dont p through gl.