condition mean min max 4 h after light 1172.828372 1096.416961 1249.239783 8 h after light 922.881075 828.45317 1017.30898 12 h after light 907.1862040000001 825.700374 988.672034 4 h after dark 901.835727 900.716092 902.955362 8 h after dark 994.796434 921.758769 1067.834099 12 h after dark 1135.378444 1135.378444 1135.378444