happy forth

i had a great 4th of july. the people right across the river and us were having a battle with fire works the only problem is that fire works are actually illegal in new york. so we got closed down in like five minutes.

A true friend stabs you in the front.

You are in Room-A with 3 switches for 3 "200 Watt" light bulbs which is in the adjacent room, Room-B, but the light bulbs are not visible from Room_A and the connector door to the next room is a one way door.

So now you have
3 switches labeled A, B and C and
3 light bulbs labeled X, Y and Z.

The condition is that you cannot re-enter Room-A once you exit from it.

Your Objective is -

Which switch is for which bulb ?