<b>Description:</b><br> <br>The glow powder is lighting when absorbing light. you need to ‘charge’ the pigments with a high lamp or sunlight for a longer time if you want to see the long luminous in the dark. <br>Compare to other colors, Yellow-green, blue-green, and sky-blue powders will be brighter. <br><b>Package Included: </b><br> 13 color glow powder