Riddle me this?

Ok.... if you like logic, and you think you might be a smart problem solver, see if you can figure this one out....

You are in a house with one floor and an attic upstairs. Upstairs in the attic there are three light bulbs. At the bottom of the stairs there are three light switches. Each switch controls one of the bulbs. You can only go up the stairs once.
How do you determine which switch controls which light bulb?

Entertain me with any quesses you might have. And if you have questions, you can definitely ask me.

I will post a hint on Saturday.
NO Cheating! (and if you do cheat, or look up the answer online, don't respond and give it away)