condition mean min max 4 h after light 9.350162999999998 9.137787 9.562539 8 h after light 9.0976925 8.188836 10.006549 12 h after light 8.930569 8.188836 9.672302 4 h after dark 9.851901999999999 9.562539 10.141265 8 h after dark 8.7435745 8.596744 8.890405 12 h after dark 12.086561 12.086561 12.086561