Sneaky ole mark of the best technique http://io9.com/5667125/new-ultra+flexible-waterproof-leds-can-be-implanted-under-your-skin
"But let's be real here - the crazy awesome applications of this invention way outstrip the humanity-benefiting ones. Implanted LEDs can be the new tattoo - put red ones down your spine for the sexy Cylon look!) Take your boring old household pets and stick some LEDs in them - instant excitement with glowing kitties and puppies! New glowsticks could be twisted 720 degrees to look like double helixes of DNA and handed out to biologists, giving scientific conferences a refreshingly heavy metal feel. And you just know somebody is figuring out how to put these things on a condom." How gross! How would you change the batteries anyhow? lol
Here's what I would do with LED implants if I was rich, I mean like Bill Gates rich. I would get 10-20 thousand field mice and have different color LED's implanted in them and then turn them loose in my neighborhood one evening:mickey:Or maybe some dental implants,or maybe have them implanted in my eyelids. Yeah I guess there is all kinds of wacky stuff you could do with them