condition mean min max 0 h after light 7.243895 6.53891 7.94888 2 h after light 9.04864 8.61137 9.48591 4 h after light 12.28565 11.9551 12.6162 8 h after light 13.1396 13.0389 13.2403 12 h after light 20.8836 20.2556 21.5116 2 h after dark 15.893849999999999 15.0522 16.7355 4 h after dark 13.3987 12.5685 14.2289 8 h after dark 11.3587 11.3214 11.396 12 h after dark 8.07418 8.07046 8.0779