condition mean min max 4 h after light 0.978461 0.757412 1.19951 8 h after light 0.973422 0.709954 1.23689 12 h after light 2.0996449999999998 1.71753 2.48176 4 h after dark 3.275575 3.06161 3.48954 8 h after dark 2.142115 1.87385 2.41038 12 h after dark 1.59898 1.39589 1.80207