Quote Originally Posted by BetterSense View Post
I, too can see light leaks around my door after I've been in there for a while. I also have glow-in-the-dark stars stuck on the walls and the enlarger head to help me maintain my orientation and not hit my head. My gralab also has glow-in-the-dark letters.

The way I see it, we are dealing with, at the most sensitive, camera film here. To get a grasp on how much light is traveling into my film-loading area, I once set a sheet of white paper there. Even after my eyes are well adjusted, I can't see it. Even if I could, suppose I wanted to take a picture of that sheet of paper by exposing the film in a camera, behind a lens, how long would I have to leave the shutter open? I would guess many hours, possibly infinity, for anything to register on the film, and that would be behind a lens aimed at a white sheet of paper. So I don't worry about having my film out in that same level of light for the few minutes it takes to load it. Even in moonlight, my camera exposure times would be many minutes, and at that level of light, I can easily see someone standing next to me, see my hand in front of my face and walk around without worry.
The illumination due to moonlight plus night skylight is up to 0.04 ft-c at full moon (or EV-3 at ISO100/21). I forget, what f/stop is equivalent to not having a lens between light and film, f/1? If that's correct, an exposure time of 8 seconds is sufficient to give Tmax-100 a Zone-V exposure, and of course, for Tmax-400, you only need 2 seconds. At f/5.6 you need one minute to fully expose, not just fog, Tmax-400. You might have to double or triple that time due to reciprocity failure.

When I develop sheet film in a tray, it is exposed to the darkroom light for about 30 minutes. I need a light proof environment in the darkroom. Moonlight or light leaks under the door are not acceptable and highly unnecessary.