Quote:
Originally Posted by Zeraph
Turn 2 on. Go into the room, I now know the first one (the one that's off). Break one of the bulbs that are on. Walk out. Turn off one of the 2 that were on. If the light goes off under the door then it belongs to the one I didn't break. If nothing happens, then it belongs to the one I did break.
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You're overthinking it. Spoiler:
Turn one on for five minutes, turn it off, turn another one on, and go into the room. Whichever one is hot when touched is the one that was on for five minutes and whichever one is on is the one your turned on second.