condition mean min max 4 h after light 514.349983 474.470076 554.22989 8 h after light 575.1090595000001 548.946557 601.271562 12 h after light 663.7624625000001 599.024538 728.500387 4 h after dark 687.7053424999999 653.486321 721.924364 8 h after dark 758.6527619999999 691.930442 825.375082 12 h after dark 621.9501 621.9501 621.9501