A brief perusal of the caresheets I see a few glaring issues. They recommend tube fluorescents, but fail utterly to mention that many of them will not project the UVB more than a certain distance (usually 12-18"). Mercury vapor is much more reliable for that. Putting a fluoro tube on top of your beardie tank does little if your beardie can't get right up underneath it. MVB's give you a little more leeway with that. Many MVB's project UVB up to 5 feet. 10-12 years might be on the low end of life expectancy. In terms of thermal burns (which are mentioned in one of the link you posted) Thermal burns are burns solely from heat - such as putting your hand on a hot object, and getting blistered. In that respect, almost any unguarded heat source has the capacity to give thermal burns if your dragon gets too close to it, or comes in contact with it. I can take a temp gun to a CHE running full tilt, and get a reading of over 500ºF. Though red bulbs get hot too, none of them get that hot. The simple solution is to put a protective layer of hardware cloth between the heat source and your dragon to prevent contact... Or use something that provides heat but not light, and does not achieve dangerous temperatures, like a heat projector, or radiant heat panel. I don't believe either page discusses those options. I might have missed the spot it was mentioned, but I could not find the page discussing a diagnosis concerning a burned parietal eye, or how it was determined.