The Nite Flite Lite is the answer for after dark Disc Golf fun! The Nite Flite Lite comes with tape and a diffuser. A white cap (diffuser) fits over the tip of the light and enhances the light... making it bigger and brighter for night time disc golf! To activate your light, simply push down on the bulb end of the battery. To turn the light off pull up on the lighted end of the battery. 21+ hours of brightness.