condition mean min max 4 h after light 2012.2 2012.2 2012.2 8 h after light 2074.55 1994.1 2155.0 12 h after light 2200.0 1984.5 2415.5 4 h after dark 1838.7 1600.6 2076.8 8 h after dark 1015.25 1008.2 1022.3 12 h after dark 1238.0 1060.8 1415.2