See the table below the picture for details.

t7's scans located a likely holding area inside the forge entrance along the way to the forge. master orgus din is being held prisoner by bengel morr somewhere near the ancient forge. your jedi knight will get the mission 'weapon of the jedi' after completing the mission 'dark temptations'. Swtor walkthrough weapon of the jedi jedi knight.

it replaces the stun baton as the ammo less weapon once kyle retrieves it early in the game. The lightsaber is the most powerful weapon at kyle's disposal, and a symbol of the jedi.