I did my first "dark" test the other day - having blocked up a couple of windows and added a new wall and door to the space where I'm building my darkroom. A faint leak near one of the windows was easily dealt with with a few dabs of painter's caulk.
I was a bit surprised by the GFCI receptacle above the sink. I knew it's green LED needed covering so I covered it with a small piece of black electrical tape. But a photo taken with my little digi-snapper at max. sensitivity (wide open, longest shutter speed and highest ISO, 2.8, 15s, and 3200) showed the whole bottom outlet glowing green. A close look reveals a single layer of tape isn't enough to totally block the LED.
So, I'll either keep something plugged in the whole time or the outlet will wear a "hat" when I'm working with film "in the open".
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