condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.137975 0.0 0.27595 8 h after light 0.1384505 0.0 0.276901 4 h after dark 1.652005 1.37984 1.92417 8 h after dark 1.381735 0.83392 1.92955 12 h after dark 0.683545 0.0 1.36709