condition mean min max 4 h after light 3.07539 3.01189 3.13889 8 h after light 3.02496 3.01821 3.03171 12 h after light 2.53158 2.12786 2.9353 4 h after dark 4.1259049999999995 3.35928 4.89253 8 h after dark 3.82659 3.49711 4.15607 12 h after dark 4.383185 3.56179 5.20458