I enjoy light writing and I think this a great tool to not only practice the art but to encourage you to try it outdoors. Good one
"thanks to the Halo LED spraycan -- a DIY project by Aissa Logerot -- which not only looks like the primary tool of al fresco art, it even recharges itself when shaken."
Halo LED spraycan lets you make grafitti the cheap, legal way -- engadget.com
"Mimicking an aerosol can, Paris-based designer Aïssa Logerot’s Halo uses an LED light in place of a nozzle and gets its power from the same shaking action that mixes the paint. The interchangeable LED bulbs allow different colors and brightness depending on the occasion. Read more"
Via James