Turn the first switch on and leave it on for ten minutes. After ten minutes, turn that switch off and turn the second switch on. Open the darkroom door, and lightly (in case it is hot) touch the bulb. If the lamp is on, and the bulb is quite hot, both switches work the lamp. If the lamp is on, and the bulb is cool, the second switch controls the lamp. If the lamp is off, and the bulb is hot, switch one controls the lamp. If the lamp is off, and the bulb is cool, neither switch controls the lamp.
Favorite Disney character?
