condition mean min max 4 h after light 1.457475 1.33884 1.57611 8 h after light 2.429545 2.35259 2.5065 12 h after light 3.30161 3.08318 3.52004 4 h after dark 2.2159666666666666 2.14992 2.28706 8 h after dark 2.94386 2.41979 3.28754 12 h after dark 1.8494833333333334 1.61966 2.1283