alright, after much thought and part hunting I have figured it out.
I can use the new generation LED's that are bright yet highly effiecient and embed a small watch battery and a light sensor at the edge of the plaque/sill plate that will go on when the door is open (or i can rig other tirggers)
in this way there is no drilling involved and the batteries should last a long time since the light is only going on when the door it open. this would be a pretty self contained system.
I can use space hollowed out from the lexan under the metal that no one sees anyway. so, couple of batteries, sensor and an LED light. fun fun.
Wow, this one takes me back. When I had the mad scientist Fridays and was feverishly working on new stuff for the CTS.