condition mean min max 0 h after light 1.466145 1.37192 1.56037 4 h after light 1.47435 1.34802 1.60068 8 h after light 1.96936 1.85456 2.08416 4 h after dark 2.335285 1.95704 2.71353 8 h after dark 1.640365 1.61094 1.66979 12 h after dark 2.00242 1.30797 2.69687