Switch on the Lights

Garden

I have a lovely roof-top garden, which is illuminated by three incandescent bulbs at three different corners.

However, the problem is that the switches of these bulbs are situated downstairs and I keep forgetting which switch corresponds to which bulb with the result that I have to switch on all the light bulbs thereby wasting a lot of power even if I am working in only a particular corner.

I have decided to mark the switches so that I light only that bulb which is situated in the corner where I wish to spend a pleasant evening.

But, I am a lazy person and do not wish to make two or more trips to the roof top to determine which switch corresponds to which bulb. I want to find this out by making only a single trip to the roof top.

Anyway, can you help me determine which switch belongs to which bulb by making just one trip to the roof top?






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