condition mean min max 4 h after light 994.0397095 798.163947 1189.915472 8 h after light 912.7833745 789.324964 1036.241785 12 h after light 966.0196355 954.345676 977.693595 4 h after dark 908.3413034999999 734.271453 1082.411154 8 h after dark 704.1671114999999 482.640628 925.693595 12 h after dark 857.693595 857.693595 857.693595