Is it normal to run through two of these in 7 months? I got a 50W the same day I got my beardy, October 25th, 2018. I cant remember exactly when the 100W was purchased, but it was a few months down the line when the 50W wasn't quite getting desired temps. Eventually the 100W burnt out and the 50W was used again, surprisingly getting near identical temps to the 100W. Both of them are now burnt out.