If you feel this doesn't benefit your particular circumstances then so be it. You dont need to listen to me or my opinions. I am not here to change the way you personally care for your tortoise . I am looking for new ideas that we as humans have not thought of yet to make our companions thrive to the best to their ability. I am merely presenting my case. I see a problem with indoor set ups enclosed or open table top that allows these lamps to take much needed Moisture away from indoor kept tortoises. For anyone to say that you know how hydrated a tortoise is just guessing based on observation. And is probably inaccurate Many .many years ago we thought animal protein was the proper diet for tortoises. And of course that couldn't be farther from the truth. Maybe we are wrong to think no harm comes from indoor enclosures and the baking affects of these lights.
I completely agree, which is why I said in my first post that I applaud your endeavours. It is obvious from your posts that you are passionate about this topic, and to me it seems like as a result you are taking my interest and debate as some kind of attack? I'm not in any way trying to debunk your observations/research or simply sit ignorant to further understanding, I am for the most part just trying to understand the method and offering a different perspective.
I wonder if you'd consider setting your tortoise up in an enclosed habitat to see the difference it makes to humidity levels and drying effects? In the summer I run one incandescent light bulb (45w I think) and a 50w CHE on a thermostat at night. That's it. In the winter I have an 80w MVB and the same CHE at night. In a closed habitat my need for those moisture sucking lights is decreased, thus less light/heat to dehydrate. Humidity varies from 50 - 70 depending on water spillage, pee, plant watering etc. When she was a baby - juvenile I used a heating pad only in the summer as all UV was from outside and in the winter, the lowest watt incandescent I could find and a tube UVB light. I have always had a closed chamber. Perhaps this is why I have never had any noticeable dry shell problems? Of course her shell gets dry occasionally, but that's true indoors or out.
I don't think the animal protein/ hydration analogy is quite true. Optimal humidity, soaking and a lack of urates, for me does tell me my reptile is hydrated. That is what I can see so I don't think my observation is inaccurate. Her pretty smooth shell and not one single problem or vet visit since she was a baby also gives me some kind of confirmation that my husbandry is adequate.
Regardless, it's interesting all the same.