How do you track someone’s indoor location down to the meter? Boston-based startup ByteLight thinks the answer is to stick a microchip in LED lightbulbs and then use its software and your smartphone’s camera to detect invisible-to-the-naked-eye lighting pulses from those bulbs, thereby revealing your exact whereabouts. via http://pandodaily.com/2013/10/25/bostons-bytelight-raises-3m-series-a-as-it-promises-to-let-retailers-find-you-anywhere/