condition mean min max 4 h after light 146.0 146.0 146.0 8 h after light 176.85 156.6 197.1 12 h after light 106.9 20.0 193.8 4 h after dark 16.05 10.1 22.0 8 h after dark 8.4 3.8 13.0 12 h after dark 33.05 3.1 63.0