Add an additional protection layer inside your DIY tube, which are going to make them much brighter: https://youtu.be/FIHVKATzaXw
This item can also be used as a high end solution (I mean, much much brighter) for DIY holographic tubes instead of cake collar (see https://youtu.be/3kHkYz6QdNY )
For complete kits fully assembled and with accessories, check out the other products on the shop: https://lightpainting.store
The gels arehigh quality real Rosco products (including the diffuser)
The caps are not compatible with regular plastic tubes, but you can do minor modifications to make them fit (one or two layers of tape inside your actual tube)