condition mean min max 4 h after light 47.5 47.5 47.5 8 h after light 86.05 76.1 96.0 12 h after light 97.15 93.3 101.0 4 h after dark 104.6 91.6 117.6 8 h after dark 169.55 158.2 180.9 12 h after dark 178.9 156.0 201.8