I covered my tank with aluminum foil and put the lamp on top like normal. I cut around the lamp to take out that piece of aluminum foil. Poke a few small holes in the top. Then I got a smallish tu pperware container and added a big handful of the moss. Wet it really good. Put both the water dish and moss under the lamp. By doing this, I was able to keep my heat lamp and keep the humidity spot on.