Every line represents 10%....20%...etc. The brighter lines are 25%, 50% and 75%. These are the ones that look out of place. So, if you had a club that hits 100 yards, but only need 75 yards, that last bright line is your 75% mark. Sooooo.... All the lines represent 10, 20, 25, 30, 40, 50, 60, 70, 75, 80, 90.....
25, 50 and 75 are brighter.