Ok, you guys brought back the memories, so here goes......
When I first got glasses, I found that even if I was working in total darkness (with film or color printing) I had to wear the glasses. I would loose my sense of balance if I took them off, even tho I could not see anything. Told that to the eye doc once, he just about threw me out of his office......
The really bright safelights where made by Thomas. I introduced them to a lab I was working in and the boss was a real oldtimer that believed a 15W bulb in a safelite was good for any size room up to 50 by 50 feet. I will never forget the look on his face when he first saw that Thomas lite. We ended up putting a sheet of paper on a table, covered part of it with the box it came out of, and left it there for 8 hours, then developed it and there was no fog on it. He watched the whole thing and still did not believe it......
One of the first darkrooms I worked in had about 5 or 6 safelights, all could be turned on from one switch. So of couse we opened them all up, took out the screens, replaced the 15W bulbs with the old flash bulbs that were about the same size (and had the same base) of a 100 W light bulb. Then we turned off the white lights and called our victom into the room. As he came through the light trap we kind of casually said, turn on the safe lights, not the whites! The screams could be heard for miles
I could go on but will spare you