Wittner Fabrice uses light stencils to create photographs which look unreal and occasionally unsettling. [more inside]
“Light painting (also known as light drawing or light graffiti) is a photographic technique in which exposures are made usually at night or in a darkened room by moving a hand-held light source or by moving the camera. In many cases the light source itself does not have to appear in the image. The term light painting also encompasses images lit from outside the frame with hand-held light sources. The first known photographer to use this technique was Man Ray in his series "Space Writing" created in 1935. The photographer Ellen Carey discovered Man Ray's signature signed by penlight nearly 74 years after the pictures had been taken” (wiki) [more inside]
10 Amazing Light Graffiti Artists and Photographers: From Light Writing to Extreme Exposures. [Possibly NSFW]
Light Graffiti. Wacky Japanese kids use glow sticks and time lapse to make a pretty sweet (embedded) video.