condition mean min max 0 h after light 0.687785 0.0 1.37557 4 h after light 2.03073 0.0 4.06146 8 h after light 0.698875 0.0 1.39775 4 h after dark 0.67429 0.0 1.34858 8 h after dark 0.676175 0.0 1.35235 12 h after dark 1.356335 1.3414 1.37127