Review (3/5): Glows pretty well
I found that as with most UV paints the yellow glowed the best followed by the pink. The blue and purple didn't show up under the light very much though as I mentioned, most blue pigment does not glow very well. As for the quality of the paint in order to get a very pigmented stroke you have to mix a lot of water into it which in turn uses up the paint rather quickly, I have only used it twice and I already hit pan on the yellow and green paints.
I love the little light that comes with it though, I bring it everywhere with me and use it to see if new products glow before I buy them.