How much Damage would a Lightsaber do in D and D?

[hamishspence]

People comparing lightsabre damage to a longsword are forgetting a VERY important tidbit of information. All damage is not dealt equally. In Star Wars d20 (where people seem to be getting the 2d8/3d8-ish figure from), you are using a Vitality/Wound Point damage system - where non-major NPCs have only their Con Score in Vitality points, and where critical hits with a Lightsabre deal damage directly to aforementioned Wound Points.

This is massively different than the D&D hit point system.

I think Saga Edition dropped the Vitality/Wound Point system. How do they work in Saga?