You can use a length of paracord as a fob , to make it easier to get the light out of a holster or pocket and possibly add some length to a small light , or as a tether , so you don't drop your light or to hang it . A brightly colored lanyard helps to locate your light . Wrapping the body of your light aids in grip and insulates it in cold weather .
And paracord can add some bling .