Hard Riddle- Can you solve it?

In the basement, there are three light switches, all in the off position. Each switch controls a light bulb on the floor above.

You may turn on any of the switches, but may only go upstairs once to see which light bulbs were effected.

How can you determine which switch controls each lightbulb?

Need a hint? Scroll down.

Keep going!

Here's a hint

Turn any one of the switches to the on position for five minutes.

Still can't figure it out?

Answer:
Turn one of the switches on for five minutes, then turn it off. Turn a second switch on, and go upstairs to see which one is on, then feel the other two and see which bulb is warm, that bulb corresponds to the first switch turned on for five minutes. The last bulb corresponds to the last switch.

This wasn't an original riddle, but I thought it was interesting and wanted to share it with you guys.

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