condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 8.02244 7.52985 8.51503 4 h after dark 0.0 0.0 0.0 8 h after dark 9.24756 1.24322 17.2519 12 h after dark 3.4784 2.061 4.8958