condition mean min max 4 h after light 3.21188 2.89152 3.53224 8 h after light 3.192085 2.64718 3.73699 12 h after light 4.98137 4.63112 5.33162 4 h after dark 5.379575 4.68742 6.07173 8 h after dark 5.067745 5.05205 5.08344 12 h after dark 3.534625 3.48967 3.57958