Let's talk about this, Jodi! For best results, Rust-Oleum Specialty Glow in the Dark Spray Paint is recommended to be applied over a white or light colored surface. It is highly recommended to prime the object with a white primer. The darker the object is, the less likely the object will glow in the dark. The product needs to dry completely and charge under direct light for 2–3 hours for maximum glow. The painted object can be charged in natural or artificial light. The closer, more direct, and more consistent the strength of the light is, the better the object will glow. Any shadows, blockage of light, or inconsistency of light during charging (i.e. gradual sunset) will affect the objects' ability to glow. The object can glow up to 8 hours under ideal conditions. Please note that the glow will continue to fade over time and will not be as strong as it was immediately after charging.
- Rust-Oleum Product Support 3