1) There are a gazillion more tutorials but none on instructables so here i am
2) I am discribing only the method to add the light saber effect in a picture, (videos are too cumbersome)
Step 1: GET UR PIC!!!!!
Step 2: START EDITING
-open pic in photoshop
Step 3: SABER MAGIC
-make sure the background colour(top right corner) is white
-set the width of the line at about 8 pixel(8 px)
Now take the line tool and starting from the base of your hand or top of your hilt stretch a line to the desired length. (this white line will be ur saber core)
Step 4: THE GLOW
Playaround with the settings until you get the desired glow.
(i keep the setting at screen, with 100% opacity,0% noise and variable spread and size)