※New※ Always on (does not flash). It can stay lit for 8 minutes after each hit. This is enough time to retrieve your balls, so fewer balls are lost! The battery lasts for 50 hours, meaning you can hit over 400 balls. The golf balls are very bright in dark environments, making it fun to practice at night. Glow golf balls are easy to find when practicing at night and are suitable for both indoor and outdoor use. It can also be used for children to play with and stimulate their interest in golf. ☆Inspected and shipped with simple packaging. As these are overseas products, please refrain from purchasing if you are looking for perfection.