condition mean min max 4 h after light 3.831383333333333 3.82901 3.8325699999999996 8 h after light 3.80274 3.74815 3.895 12 h after light 3.73624 3.68436 3.76779 4 h after dark 3.7937166666666666 3.7226 3.84419 8 h after dark 3.77359 3.7222699999999995 3.8212800000000002 12 h after dark 3.7964266666666666 3.7488300000000003 3.8690599999999997