The paints are very transparent, which means many coats are required to get any substantial color on a canvas, and they end up making a chunky texture. I used regular acrylics as an undercoat to make the colors pop better. Very limited glow after exposure to light, but glow very strongly under UV flashlight. If I were to want more glow in the dark paintings in the future, I would just get glow powder to mix with regular paint. instead, because it took forever to get enough coats with these, and they still only glow if you're shining UV directly on them.