Attention:
1), They are Fluorescent Balls, Not nearly as Bright as LEDs balls.
2), Take 10 seconds to charge by a UV flashlight and the glow lasts about 15 minutes, Not a few hours.
3), You have to "recharge" the balls with a flashlight between holes. or replace the with a fully charged refresh when you got to the green every time.

Charge time is VERY fast, You can fully charge a in 5 seconds by rotating it around on a UV flashlight of any power.
This is really the best glow and it's close to a real golf . They will not damage your set. This Fluorescent Balls really helps your golf game to focused nothing other than the if you play at night,
When you reach your on the course, charge it again. You have to "recharge" the balls with a flashlight between holes. All you have to do is bring the flashlight with you and everyother hole hit them with some light for like 10 seconds then you're good to go.

【10x Fluorescent Balls for Night Golf, NOT Include UV Flashlight】: Inner no , No battery. the balls have a bright fluorescent glow and recharge by sunlight or a UV flashlight.
【They Charge Quickly, Stay Bright for a Long Time】: Takes 1 minutes to charge and they'll last about 15~20 minutes. the closer to that 15-minute mark the less glow there will be. But it's rechargeable & reusable forever.
【They’re Real Golf Balls, Hit better, Illuminated Better】: They are same size and weight as regulation golf balls. The travel nearly the same distance as normal golf balls. Feeling much like a normal golf when hit, which is why people prefer Fluorescent balls over balls.
【Durable 2 Piece Construction】: Inner synthetic material for good elasticity, and the Surlyn material with fluorescent outer cover withstand more than 1000 hits.
【Easy to Track the Flight of the , Easier to Find】: After driving off the tee, it is easy to track the flight of the . you can always find them wherever they are.