condition mean min max 4 h after light 320.0 320.0 320.0 8 h after light 255.0 186.6 323.4 12 h after light 214.75 180.1 249.4 4 h after dark 111.9 93.9 129.9 8 h after dark 89.75 86.0 93.5 12 h after dark 131.95 78.4 185.5