Looks like LED light sabers for light painting capture that interesting Venn Diagram intersection between photography and hackering.
After featuring Lightscythe – a light painting LED wand that can be loaded wireless comes another detailed tutorial from Michael Ross, which may be more suitable for the beginner Arduino. photographer.
If you are wondering what it does check the photographs below.
Here is the first of the video tutorials if you wanna get the general notion of what is involved.