condition mean min max 4 h after light 8.517149999999999 7.60171 9.43259 8 h after light 9.021715 8.85256 9.19087 12 h after light 10.889050000000001 10.8252 10.9529 4 h after dark 15.192900000000002 14.016 16.3698 8 h after dark 12.229800000000001 12.0693 12.3903 12 h after dark 10.309825 9.75855 10.8611