first of all. the screen mesh thingy wont keep humidity up enough. enless you tape plastic all over it eccept for the top wich isnt very pretty. and second iguannas are alot of work. youll need to buy melissa kaplans green iguanna for summies its the iguanna bible. also you have to remember iguannas go thrue breeding season agression its different for each iguanna but some can get very mean during those times and it can last over a month. they do need uvb. and i suggest reptiglo 8.0. it needs to be put 6 to 8 inches away from the iguanna nothing smaller or bigger. i suggest
www.greenigsociety.com www.iguanaden.com and
http://www.anapsid.org/ those are great sites. and i also suggest joining the iguana den forum in the iguana den website. their great for iguanna care. iguannas are alot of care but if you know what your doing their great. make shure you can give him more than the minimum he needs. and make shure he doesent end up being put to sleep or given away to just anyone because you make a mistake. alot of people do that.