20g of Neon Yellow to Yellow/Green Glow. all of the pigments have been testing under UV and under UV Rays (sunlight). Some will come in a scoop jar, which will be limited. others will come in a small flat lid 1oz jar.
measured by weight not volume.
The pigment particles are charged by most any visible light or ultraviolet light. The pigments then release energy in the form of visible light for 30 minutes and as much as 24 hours. These pigments do have to be charged enough for a long lasting glow.
More powder, higher percentage will produce brighter, longer glow.
Use a white, or light color as a background for best results. Any color other than white will diminish glow.
Potentially, the higher amount of glow used the brighter the glow and potentially a longer glow.