condition mean min max 4 h after light 2.415645 2.10445 2.72684 8 h after light 3.07065 3.03194 3.10936 12 h after light 4.209715 3.75582 4.66361 4 h after dark 5.61315 5.25755 5.96875 8 h after dark 4.003185 3.73127 4.2751 12 h after dark 4.29837 4.19446 4.40228