This is a tool that I've been using since 2012 and I am still using it a lot! My favorite colors are Sugar, RainbowTrout, Rainbow and Alien (in that order)
11x11" Holographic squares
3x HoloSquare pieces
Demo / How to use
These are simple holographic sheets. You need a flashlight to use them to do light-painting. Put your camera on a tripod and set it to blub mode. Using a remote trigger, start the exposition, wave the light around your subject and then end the exposition.