Originally Posted by
chollie
I wonder if those little light tubes that you snap to 'turn on' would also fall into this category. They don't generate heat, but there's some sort of chemical activation going on.
They're useful for night diving/snorkeling.
As you say, they don't generate heat. Why would they be an issue?
The warmers, though--if a box of them got damaged and released their heat faster than they were supposed to...