condition mean min max 4 h after light 1584.0138865 1268.021977 1900.005796 8 h after light 1289.3380455000001 1280.333681 1298.34241 12 h after light 1321.6716219999998 1273.201384 1370.14186 4 h after dark 1653.5111135 1300.001288 2007.020939 8 h after dark 2120.128235 2072.664981 2167.591489 12 h after dark 1967.57504 1967.57504 1967.57504