condition mean min max 0 h after light 7.9762450000000005 6.97475 8.97774 4 h after light 8.999604999999999 8.85156 9.14765 8 h after light 7.560309999999999 5.98182 9.1388 4 h after dark 7.39622 5.39834 9.3941 8 h after dark 9.69276 9.28042 10.1051 12 h after dark 8.42854 7.1595 9.69758