condition mean min max 2 h after light 11.7285 11.4457 12.2341 6 h after light 11.9724 11.21 12.698 10 h after light 10.5961 10.1593 11.3136 2 h after dark 13.527 12.9054 14.0739 6 h after dark 17.942933333333333 17.3915 18.8036 10 h after dark 24.2799 22.9476 25.5564