Our store offers a great selection of glow-in-the-dark products, and we are always adding new colors as well. The invisible glow colors are going to give you the longest lasting glow. The Green, Aqua, Mango, and Orange are going to last a bit longer than the Blue, Purple, Red, Pink, and white. Because of the composition of the phosphorous matter these glow materials are produced with, they will be very bright when charged, but do not have as long duration as the other colors.
We always get asked what is your brightest and longest lasting Glow color? That will be the Green, the Invisible Green, The invisible Aqua, and Aqua. The greens will literally last over 12-14 hours when fully charged by a UV source. These colors are often used to illuminate at night because they are so bright and last so long.
Survivalist usually stick with the Invisible Green for lighting their way at night.