condition mean min max 4 h after light 33.272 32.1142 34.4298 8 h after light 23.60955 23.6037 23.6154 12 h after light 14.6067 13.8659 15.3475 4 h after dark 15.2617 14.451 16.0724 8 h after dark 15.1509 14.1515 16.1503 12 h after dark 20.68815 20.5715 20.8048