If you don't want to go near the circuit board, it seems to me that you could tap into the line that runs out to the lights at any point, and put a little indicator light in there.
Maybe there is some point along the wire route that is convenient to see from bed or when getting ready for bed.
I am not Mex, but I want to be him when I grow up. :B
prichardson wrote:
Instead of adding a pilot light put a dab of red fingernail polish or paint on the edge of the switch that is exposed when in the on position.
This is what I did with my heater! You can also get glow-in-the-dark paint at a hobby store