logical riddles with answersRiddle.......Logical answers only please?

There is an empty room with a light fitting and a working lightbulb attached to it hanging from the ceiling in the centre. The light is OFF.

There are 3 light switches outside of the room. One of these switches controls the light bulb in the room (the other 2 do nothing). How do you determine which one controls the light?

NOTES:
The room has no windows and one door (no glass panels or gaps underneath it).

You may enter the room only ONCE (to see if the light is on or off etc).

You may NOT leave the door open.

You cannot see the lightbulb from the switches or from anywhere else other than inside the room.

There is no other signal or indication that the light is on or off from outside the room.

1st person to get the correct answer gets ten points. If no-one gets the answer, I'll post it tomorrow.
Ok you label the switches 1, 2 + 3. Put switch one on and leave it on for 10 minutes, then switch it off. You then switch two on. so when you go in the room, the light will either be hot to touch (Switch one), be on (Switch two) or be cold and off (Switch three).
Logical thinking.... I logical riddles with answerswould of never of guessed that!

Someone stand inside the room & another person turns the switches untill the light comes on?

Or turn all three on & then open the door?
Use a voltage tester to see which one has electricity running though it when flipped, no need to ever enter the room unless you just want to make sure the bulb is ok too ;-)
Flick all 3 switches at the same time,
turn all 3 switches on, because one of them will turn the light on, and the other 2 will do nothing anyway!! :)
That one is hard but I would like to know the answer.
Open the lightswitch and see which one has wires in it?
its not the right answer but i suppose you could inject the light bulb with petrol or something and the switch the switches 1 by 1 and listen for the bang.

i recon supercell is right
turn the 1st light on and wait 10 minutes (then switch it off)
then turn the 2nd on and wait 10 minutes (then switch if off)
turn on the 3rd and enter the room

if the light is on, then the 3rd switch is the working one
if the bulb is warm but not on, then its the 2nd
if tlogical riddles with answershe bulb is cold then its the 1st
switch all 3 lights for 1/2 hour, then turn off, go into the room. 2 bulbs would be the cold and the third will be hot, that way you can determine that that bulb is the one that works.

xx
swich the first one on then wait 10 min, switch it off then switch the second one on and go to the room
if the bulb is hot and off it's the first one
if the bulb is off and cold it's the third one
if the bulb is on it's the second one
edit:
there are correct answers before me! sorry i didnt read them carefully before posting mine!!!
Turn on the first switch. Leave it on for about 15 minutes or so.
Turn off first switch, and turn on second switch.
Go into the room. IF light is on, it is second switch. If bulb is warm/hot, it was first switch.
If neither, third switch.
if the bulb becomes hot after some time, then the switch will also become hot.
so i have an even better method to see that. you on all of the switches and the one which is hot after some time is the one which controls the bulb.