This is real. Hero Tech has built a retractable light saber that is using no visual effects. You cannot fight with it but it looks like the movie light saber. The two led light strips are attached to a retractable magicians cane. The internal setup

Oak Ridge National Laboratory and North Carolina State University researchers have developed a simulation capable of predicting how tens of thousands of electrons move in materials in real time, or natural time rather than compute time. This combines