condition mean min max 4 h after light 0.324576 0.292446 0.356706 8 h after light 2.727415 2.51969 2.93514 12 h after light 39.93015 39.5525 40.3078 4 h after dark 59.576433333333334 57.8495 61.5115 8 h after dark 15.7957 15.4588 16.0659 12 h after dark 1.7827333333333333 1.63463 1.86501