but I want to thank you for this, because I used this trick to troubleshoot my brake lights (it's hard to view the bulb while sitting in the car pressing the brake pedal). I could have wedged something between the brake pedal and the seat, but I figured this would be easy enough, and it worked.
Dude, back your car into your driveway at night and look for the brake light glare against your garage door in the rear view mirror.
I don't object to the use of the term "logic," but most rooms I've been in you can't just reach up and touch a light bulb. Your premises were incomplete as they did not mention the light bulbs were in arm's reach (or are you using a ladder in the other room? Or a hot air balloon? You don't even tell us how you reach them).
An equaly good solution is to walk into the room and use your magic lightswich identifier box. ...Oops, sorry, did I forget to mention you had one of those?
It's kinda like that.