The rocks you see below feature three of my best to date. I have used a high-grade phosphorescent paint, a one-step crackle finish, adornments ( i.e. flower of life hologram sticker ), and a final coat of resin on each rock. The showing is how they appear in regular light ( an incandescent bulb ), a UV blacklight ( a large Industrial strength studio lamp), and moderate darkness to show what the rocks look like when activated. To activate a rock only takes a few seconds, and depending on the quality of Phosphorescent Paint will determine the intensity of the glow and the length of time it will glow.