I've finally gotten a new copy of TSL and this is something I whipped up for myself while enjoying my first playthrough in forever. Basically, this animates the lightsaber blades to flicker. It also fixes some brightness-related errors in some of the new colors Obsidian introduced, primarily with the silver color looking like a collection of planes.
I haven't tested these in K1, but I can't see any reason why they wouldn't work in either game.
Specifics can be found in the readme.
Get it at KotOR Files