condition mean min max 4 h after light 2593.6 2593.6 2593.6 8 h after light 2213.8 2086.2 2341.4 12 h after light 1767.95 1515.9 2020.0 4 h after dark 1299.15 1241.8 1356.5 8 h after dark 1291.45 1063.5 1519.4 12 h after dark 1611.0 1491.1 1730.9