condition mean min max 4 h after light 45.1 45.1 45.1 8 h after light 48.55 33.3 63.8 12 h after light 76.1 74.4 77.8 4 h after dark 76.25 53.3 99.2 8 h after dark 77.5 57.9 97.1 12 h after dark 56.3 52.6 60.0