condition mean min max 4 h after light 8.792077500000001 8.124494 9.459661 8 h after light 9.800777499999999 8.267216 11.334339 12 h after light 8.953156499999999 8.045722 9.860591 4 h after dark 7.7787845 6.925199 8.63237 8 h after dark 8.4695255 8.306681 8.63237 12 h after dark 8.253873 8.253873 8.253873