What I did for mine was to disassemble the clock and print a set of icons that appeared over the lights, so they didn't appear just as lights if we ever shot a closeup (which we did).
May do that. Just need to think about it a bit. I was thinking of different functions for each.
Not sure if it's already been asked before but will you add some cheap alarm clocks for the red mission time displays? With a bit of luck stuff like that can be bought for less than five bucks per piece.
Believe me, this was a point of discussion we had with our electrical guy. We even looked at red digital displays that could be synchronized and set to run during filming. However, my associates and I came to the decision not to use the red chronometers at all.
Our set decorator/graphics guy may have more input on this...