condition mean min max 2 h after light 12.183728333333333 7.76007 19.1171 6 h after light 15.291553333333333 8.55057 20.1632 10 h after light 13.413768333333334 6.73141 20.1902 14 h after light 19.4413 12.3929 25.8034 18 h after light 21.5423 17.1757 26.8203 2 h after dark 21.3679 14.9054 28.1012