condition mean min max 4 h after light 5626.995 5494.4 5845.65 8 h after light 5484.179444333333 5207.575 5720.713333 12 h after light 5886.171111 5258.156667 6216.553333 1.5 h after dark 5983.956666666667 5756.09 6330.39 5.5 h after dark 6276.496666333333 5729.273333 7113.253333 9.5 h after dark 6018.501111 5769.023333 6172.433333