Mr. Diver,
I get the intended pun-I have glowed once when a new Christmas gifted shirt with plenty of fuzz ignited from aluminum wiring sparking in a dimly lit room. As an electrician, I was doing a volunteer project for a retired Army veteran when his wife told me that my shirt was emitting an all over blue glow after shorting the hot wire to a ground wire. The shirt was saved, but my pride was somewhat damaged when she threw a towel on my shoulders. The words “You’re on fire!” got my attention.
In reference to the original subject, I also think that the coolant should be checked for combustion gases. I think the test kits are around $30.00, give or take. The test liquid that comes with the kit changes color when carbon monoxide is detected, I believe.
Larry