Nighttime Aqua Glow in the Dark Powder 1oz, Slice of the Moon, Uv Reactive Powder for Arts and Crafts 1 ounce of invisible aqua glow in the dark powder This powder charges fast and bright; will glow for 8 to 10 hours when properly charged Has a day time color of light yellow and glows bright aqua at night. Mix in clear or white transparent oil or water based mediums, such as urethanes, paints, varnishes or gels Use with your mAnimolds to make mAniglows for your wall and ceiling ornaments