Super Phosphorescent Glow Powder Pigment 1/2 oz - Blue/Green - No UV Light Needed! No UV or Blacklight Needed, Charges with the sun or indoor lighting Glows Blue/Green (aqua) in the dark - Neutral off white day color Long Afterglow 10+ hours, Glo Effex Powders are doped with the rare earth mineral Europium for the ultimate glow Non-Toxic and Odorless - Great for paint, epoxy, resin, slime, etc. Works in water or solvent based mediums