As fine as grains of sand and embedded into the root of transparent hairs to act as fiberoptic extension, this body art can twinkle, shimmer and shift between colors. It is especially popular in clubs and counterculture.
More sophisticated, expensive variations are hooked up to the nervous system and can be controlled accordingly by the wearer, who may make them pulse in tune with his or her nerve impulses. With this method, LED tattoos are also used as a subtle means of communication, especially in context of illegal transactions.
Reddit user: indridcold137