DIY kits for light-painting tubes (pack of 4!)These are the same materials we use in our tubes. We're making them available for you as a cost saving option and also to open the door for you to get creative with different ways of mixing the colors. If you follow the instructions below, you'll end up with the same light painting tubes we sell on our store, including the way we seal them and the identification tags. Instructions: Cut down a clear T8 tube from 46. 5" to 44" Insert the whole slice