Yes a bit is reflected but it is greatly reduced! Yes it does. And when it rains they either seek shelter under the leaves or just sit there and enjoy it. But there is also a great deal of sun. And iguanas gather up at the top of the trees where they soak up that blazing tropical sun and when they have had enough then they move into the shade. This goes on back and forth all day long. No! Often reptiles reach breeding season not so much on a timetable but by physical size and maturity. It DOES NOT mean you are doing anything wrong.