condition mean min max 4 h after light 5.258035 3.93465 6.58142 8 h after light 9.02191 8.76899 9.27483 12 h after light 9.289215 7.90023 10.6782 4 h after dark 6.056746666666666 5.55663 6.39091 8 h after dark 9.404466666666666 9.16748 9.80863 12 h after dark 6.51397 5.99348 7.07343