condition mean min max 4 h after light 29.92145 27.8845 31.9584 8 h after light 17.25485 17.1446 17.3651 12 h after light 18.4071 16.8292 19.985 4 h after dark 19.8973 19.1583 20.6363 8 h after dark 16.008499999999998 15.2409 16.7761 12 h after dark 19.182650000000002 18.7024 19.6629