condition mean min max 4 h after light 1189.1 1189.1 1189.1 8 h after light 1252.5 859.6 1645.4 12 h after light 1554.6 1341.5 1767.7 4 h after dark 1231.85 850.0 1613.7 8 h after dark 1234.0 1222.8 1245.2 12 h after dark 1400.35 1118.0 1682.7