condition mean min max 4 h after light 68.2 68.2 68.2 8 h after light 66.95 31.5 102.4 12 h after light 61.2 58.0 64.4 4 h after dark 117.45 107.7 127.2 8 h after dark 97.75 78.9 116.6 12 h after dark 146.05 144.2 147.9