I don't know too much about what lightwriters use to leave cool-looking streaks in the dark (lights, I imagine), but the "halo" by designer Aissa Logerot has got to be the classiest way to do it. It looks like a spray can, acts like a spray can, and feels like a spray can — but it isn't one.
From the designer:
halo is a handy light specially dedicated to light-writting. Graffiti artists can conserve their own gesture they have with a spray can. 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.Check out more of the LED can down below.