condition mean min max 4 h after light 5.98017 5.69295 6.2101 8 h after light 6.2675600000000005 6.02433 6.558660000000001 12 h after light 6.38512 6.0139 6.70982 4 h after dark 6.402546666666667 6.23345 6.66875 8 h after dark 6.282636666666667 6.06264 6.50983 12 h after dark 6.287116666666667 5.97569 6.49277