A class ii true uv ultra violet laser pointer can be used as a traditional laser pointer for demonstrations etc but as this laser is uv it is particularly brilliant for using on our glow graffitee shirt or glow shadow walls watch the video to see the pen in action each pen comes with five lenses so that you can swap and change effects from a simple pointer to clusters and morer r ultra violet light is the best light to get glow in the dark products really glowingr r 1mw purple laser point