Picked these up as I had a 5pm tee time and figured I'd have a few holes in the dark. As luck would have it, we only had to play 18 in the total dark so I broke these out and handed one to each member of our foursome. I didn't hit my driver after seeing many reviews of LED golf balls caving in modern drivers. Teeing off with my 1 iron it made a really loud "clack". I had the blue one which was a bit tougher to see but the pink, green and white ones were very easy to see. Other than the loud clacking what bummed me out was that when we got on the green they all went out. So, they last exactly 8 minutes and do NOT restart the time on each hit which seems suboptimal. If we were playing a par 5, I'm sure we would have lost one or more of them as they went out. I think if they could be made with just a bit softer of a cover so you could use a driver and if they would restart the timer on each hit, they would get 5 stars.
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