condition mean min max 4 h after light 20.3511 19.5692 21.133 8 h after light 23.6254 22.5114 24.7394 12 h after light 26.22945 25.0085 27.4504 4 h after dark 30.1374 29.7909 30.3691 8 h after dark 31.786766666666665 30.2777 34.3587 12 h after dark 28.116233333333334 26.4037 29.1904