condition mean min max 4 h after light 7.679545 3.93929 11.4198 8 h after light 17.5766 13.3028 21.8504 12 h after light 15.35715 14.5504 16.1639 4 h after dark 16.7513 15.4039 17.601 8 h after dark 16.236333333333334 14.2141 17.7658 12 h after dark 13.834866666666667 8.3556 21.0993