Lightmark is made up of the twosome Cenci Goepel and Jens Warnecke who like to travel around the world and create beautiful light art photos as they go along. They use different light-sources ranging from LED lights to various kinds of fire. See some of their shots in the gallery below.
More of their long exposure shots can be found at Lightmark.de.
See more light graffiti and photography at WebUrbanist.