from starwars.com, its explained
When deactivated, a lightsaber appears as a polished metallic handle, about 30 centimeters long, lined with control studs. At the press of a button the energy contained within is liberated and forms as a shaft of pure energy about a meter long. The saber hums and scintillates with a distinct sound. Its shimmering blade is capable of cutting through almost anything, save for the blade of another lightsaber.
😄
A guy, a man, a dude, a homey, whatever man, as long as I can turn my lightsaber on in the evening...
BTW Kip, just to get COMPLETELY off-topic here, seeing your signature thumb thingee, I saw Napoleon Dynamite yesterday, and was disapointed by it, it started great, but I thought the humor quickly became flat and predictable. I heard it's real popular in the States, being referenced to death à la Austin Powers and all. Is that true? The film is real unknown here in Belgium.
(BTW We have you're president now, so behave... aah, too be Belgian, first we keep your president hostage, then we get to see ROTS before yous guys... only one step away from world domination now ;-))
Not to disrespect the original poster, but if you watch the OT, Luke is very exageratted (Obviously pushing on it or whatever) ACTIVATING his light sabre in a couple of the scenes. Not to mention the Han scene in Empire. Personally, I think having to use the force to activate it would make more sense in the "Only force sensitives/Jedi use light sabres." theory.
Carnage
i disagree carnage.
a jedi must use the force to weild a lightsaber, in order to block laser blasts and whatnot. they can see things before they happen, and thats why they are
so good at it, as quigon put it. as far as turning the thing on, in itself its just another weapon. its a cool idea though, having to use the force to ignite it. kinda like a safety mechanism in case it fell in the wrong hands.
as far as turning on a saber, people can argue that luke used the force when he turned his saber on (utter nonsense, but how do you prove them wrong?).
the proof is in one man: han solo. he turned the saber on, so it must be a switch.