condition mean min max 4 h after light 1.76745 1.72233 1.81257 8 h after light 1.59554 1.24593 1.94515 12 h after light 1.1509010000000002 0.959052 1.34275 4 h after dark 1.9537300000000002 1.7859 2.12156 8 h after dark 1.66716 1.52466 1.80966 12 h after dark 1.9760049999999998 1.72501 2.227