The water fall /wall is higher tec than I wanted to go. I think I will try isolating my lights in the top section of my case with a sheet of glass or plexi and exhaust the warm air through top vents with fans. I am quite sure I can get enough humidity if I can cut the heat from the lights before it gets to the plants. Perhaps a fan or two blowing over the water in the humidity tray will help. That is what William Cullima (sp) did in his first case, as described in his orchid book, and he said it worked. If it doesn't I'll have to consider more drastic measures like a misting system of wet wall. The blanket idea was an attempt to cheap out..