Light Painting is a technique of Exposure by moving hand-held light sources while taking long exposure anyway there is another way to make light painting by moving the camera itself during exposure. the technique is using both scientific and artistic skills.
In 1889 Etienne-jules Marey and Georges Demeny together they established a programme of Research which lead to creation of the station Physiologique. then in 1882 Marey and Demeny Developed several photographic techniques to study movement of everything from Humans to Horses.
These are some of thing you can do with light painting.