condition mean min max 4 h after light 93.2 93.2 93.2 8 h after light 101.8 98.8 104.8 12 h after light 50.3 44.3 56.3 4 h after dark 58.15 53.3 63.0 8 h after dark 55.75 33.0 78.5 12 h after dark 31.4 31.0 31.8