condition mean min max 4 h after light 16.90155 16.4876 17.3155 8 h after light 16.0975 16.0666 16.1284 12 h after light 15.177 14.3597 15.9943 4 h after dark 18.665750000000003 16.1306 21.2009 8 h after dark 16.86105 16.609 17.1131 12 h after dark 17.907249999999998 16.8127 19.0018