I had it on for about 45min earlier and the ballast just barely felt above room temp. I'll have it on longer tonight (now) so I'll let you know if it gets hot. I just wish this ballast had a lug for ground. I'm going to be building a wooden fixture for it and the ballast is aluminium encased, so I'll have to use one of the screws as the connection point. Right now I have the wire crimped through the hole while it sits on my table-thing.
I didn't mean "burn out" as in permanently damage, but you do get photochemical depletion. After going from a high intensity LPS environment to a white light one colors still look funky for about 30mins I've noticed. That's all I meant in the vid, plus it's YT, better exaggerate safety whenever you can.