Sorry for your loss. Its odd, but in those last pictures, It got a feeling, he/she, was not right looking.
Also, If I am lucky with this guess, I would get the feeling, your using to much heat, of course I am only guessing, but it strikes me as your lites are too close together.
There is all kinds of ways to injure them with heat, not only surface burns, but also deep heat problems. Some species of monitors like albigs seem to have real thick skin and are not prone to burning. Others like Blue-tails and lacies, can get burns very easily. Which indeed teachs you the limits of litebulbs. One of the reasons we moved away from all halogen lites.
I used them for many years, then all of a sudden, they did not work and caused lots of burns and problems. Again, sorry for your loss. FR