Quote Originally Posted by hooograa View Post
Incandescent bulbs are resisters in a vacuum
I used to think that, too. When I was 8, I made a bet with my dad that if I broke a light bulb in a bucket of water, no bubble would rise to the surface - the vacuum would just collapse. When I lost that bet, I did some reading (way before the Internet) and found that most household bulbs had argon in them.

Anyway, that brought back memories.

Plus one for getting a real safelight. Red is safest, but OC helps differentiate colors, which may or may not be worth reduced time before fogging sets in.