The electronically lighted Night Flyer™ CL LED Golf Ball features a three-layer construction, Surlyn cut-proof cover, and 80/85 compression. This ball's bright glow is activated on impact and stays illuminated for approximately 9-10 minutes. A built in timer automatically shuts off the light to conserve batteries until the ball is struck again making it perfect for early morning play or last few holes at dusk. LED lasts 30-40 hours...
Personally, I have LEDs last over a month being active.
• Approximately 30 hours of total usage time
• Built-in timer
• Lights on impact
• Sold as single golf ball