My enlarge came with a timer that I plug the safelight into. I can turn the safelight off. My wet darkroom is in another room and I can use the Gra-Lab there if needed. I use the Gra-Lab for timing film processing with the Jobo.
The problem using a Gra-Lab "safelight" plug is that... for several minutes of time you are in blissful darkness, then you hear a click. And the safelight comes on. Not necessarily a good thing when developing film. So I plug it into the "enlarger" plug and set the time for a good 20 minutes. Fine when working prints, but my fallacy, my error, comes when developing film with that setup after having done paper... And midway through development I turn on the GraLab to prepare for fixing. Blam. The safelight that I forgot was "on" comes on.
The phosphorescent material on a Gra Lab timer does NOT fog B&W paper, just color paper. It only seems to fog fast B&W films. Remember that the color is green which is an acceptable safelight color for some materials.
mine dims pretty fast so i never have to worry about fogging ...
i usually just set it, and listen for the "click" for when it stops
( the alarm is too alarming for me .. )
if i shine a bright flashlight and charge the phosphors it still doesn't
stay very bright ... it does seem to keep OK time though
i have never gone the wrong direction with the hands, which usually is
the reason they die ...