Montana Night Glow SprayMontana NIGHT GLOW is a high grade acrylic spray paint that contains luminescent pigments that absorb and store light particles, then emit glowing light in darkness. The intensity and length of the glow period depends on the thickness of paint layer applied. It is recommended to apply multiple layers of NIGHT GLOW over a well primed white surface. The glowing effect will be strongest immediately after charging the painted surface with a strong light