A dolog nem teljesen egyertelmu. Az Episode IV-VI script mindkettot
rendszeresen hasznalja, viszont a szereplok kivetel nelkul "lightsaber"-t
mondanak. Pl.:

BEN: Your father's lightsaber. This is the weapon of a Jedi Knight. Not as clumsy or as random as a blaster.
VADER: I see you have constructed a new lightsaber. Your skills are complete. Indeed, you are powerful, as the Emperor has foreseen.

En a lightsaber-re szavazok es ahogy Anakin azt mondja "laser sword"
szinte bantja a fulemet.