condition mean min max 4 h after light 8.052329499999999 7.435598 8.669061 8 h after light 8.843557 8.669061 9.018053 12 h after light 8.916341500000001 8.698769 9.133914 4 h after dark 8.669061 8.669061 8.669061 8 h after dark 9.37463 7.903438 10.845822 12 h after dark 8.422852 8.422852 8.422852