Halo

Saw this on core77 recently: halo is a handy light specially dedicated to light-writting. Graffiti artists can conserve their own gesture they have with an aerosol spray. It is possible to change the color and the brightness of the led to change the graffiti’s styles. If the light doesn’t have enough battery, the user must shake it to have energy again
http://www.aissalogerot.com/