Is this a good Iguana cage plan?

yeah it sounds pretty spot on the 6 height and width will give you room to put a lot of tall branches/sticks for him to climb on.Iguanas in the wild live about 60feet up in the trees.But make sure you seal the enclosure with dry lock it is harmless to reptiles(chemical wise)If you use polyurethane to seal make sure you give it about 2weeks to air out.Oh yea you should move the uvb source back alitte depending on the wattage there is a such thing as over exposure to uv.Try about 12 - 18" away.Every thing else seems pretty spot on.