condition mean min max 4 h after light 1.5857999999999999 1.39966 1.77194 8 h after light 1.662955 1.38818 1.93773 12 h after light 2.620025 2.56561 2.67444 4 h after dark 3.6899249999999997 3.58987 3.78998 8 h after dark 3.40616 3.1516 3.66072 12 h after dark 2.406035 2.34078 2.47129