If u had some golf balls used and not used. what would you use to rate which one is bright or dark than other?

Question

If u had some golf balls used and not used. what would you use to rate which one is bright or dark than other?

Answer 1

What would I use to rate which one is brighter or darker than the other?

My eyes.

Answer 2

if the balls are getting darker because of age, its time to replace them anyway. The best way to tell is by scuff marks on the cover or grass stains. If you cant see a difference dont worry about it unless youre scratch, you wont be able to tell the difference in your game