Considering that you are thinking of using a glass tank for warmth and a wider shorter one for climbing safety I think the mercury vapor bulb will be too hot generally (a risk of thermal burns on a cham who won't be as reactive or agile) and too dry (she might be more easily dehydrated because she's aleady compromised and because you'll need more air exchange to keep a tank from getting stagnant). You can raise the bulb higher over the tank, but too far and the UV she'll get will drop. Not something you want if you are trying to provide optimum lighting to reverse MBD. Also, a lot of the heat will be dispersed into the room and MV bulbs are fairly expensive in terms of energy use. You may not need all these expensive watts. For a tank, a general white house light bulb at one end will work for basking and heat gradient, and a tube ReptiSun 5.0 will be the safer option to provide UVB. The tube lights don't produce much heat but the fixture ballasts create a little. Again, they'll be on top of the tank and heat rises.

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