Yes, Sauvagii are the ones that like to just sit right under the light. Mike Novey IS a wealth of information when it comes to keeping and breeding Phyllomedusa species. I have a friend locally that has an awesome set-up for Sauvagii as well that Mike Ready and Philippe De Vosjoli helped him with while he was visiting Microcosm this year and I believe he posted about it on dendroboard. If you do do a search there you may find the thread he posted on it. I'll look for it and if I find it first, I'll just post the link.