condition mean min max 4 h after light 7.816963333333334 7.5085 7.998460000000001 8 h after light 7.333413333333333 6.889239999999999 7.5724100000000005 12 h after light 6.65209 6.22994 6.86695 4 h after dark 7.528980000000001 7.238460000000001 7.735060000000001 8 h after dark 7.8163 7.31588 8.31942 12 h after dark 8.847626666666667 8.73657 8.95716