The Developers have stated that all choices made during the story quests are tallied up, Once you reach the end of the chapter the higher score wins. This is a separate scoring from Alignment which is marked against all missions. You could play a evil character for everything apart from story missions where you instead choose light options and at the end of the chapter you will get the light side end.
thats not what his asking. his saying his trying to play a light side sith but there really isnt much light side options..but more like "dark light" side options.
Although there is light side options i saw later in the game i never chose them, they still looked to be somewhat a dark lightside choice if that makes sense?