condition mean min max 4 h after light 659.5 659.5 659.5 8 h after light 672.6 584.2 761.0 12 h after light 656.25 594.0 718.5 4 h after dark 1013.2 723.7 1302.7 8 h after dark 1270.0 1236.2 1303.8 12 h after dark 1193.3 1085.1 1301.5