condition mean min max 4 h after light 4.13888 2.1888 6.51797 8 h after light 3.37302 1.31887 5.27473 12 h after light 5.24927 2.8835 7.39992 4 h after dark 6.69579 5.91448 7.44315 8 h after dark 6.689816666666666 4.50131 8.37275 12 h after dark 5.561403333333333 4.65429 6.72107