condition mean min max 4 h after light 5.749546666666666 5.51496 6.09024 8 h after light 4.53661 1.34186 6.13975 12 h after light 5.454393333333334 4.13991 7.21094 4 h after dark 7.113933333333334 6.28031 7.65494 8 h after dark 8.85206 6.26235 10.39 12 h after dark 9.92583 7.30909 13.1467