Overbrading can be purchased by the roll, newark electronics has shielding that will go over wireing harnesses. (This eliminates the hazard of EMF pulses damaging on board computers when properly grounded, it is standard on jet aircraft) You only need this if you are a drug runner. The tin coated copper is $30 - $200 for a 100' roll, depending on size. Zipper mesh shielding has a zipper for easy access if that is important! Another option is colored heat shrink fabric (least abrasive to other harnesses/hoses) Expandable color polyester braiding is my preferance. It is light, non abrasive, and avalible in many colors. The brading will expand when pushed together. I like brousing Mouser's online cataloge. www.mouser.com
They sell LED's too.
Check out glowing phosphorescent heat shrink tubing!! / glow in the dark heat shrink