condition mean min max 4 h after light 8.131808 7.794074 8.469542 8 h after light 8.929081499999999 8.248482 9.609681 12 h after light 10.441909 8.250177 12.633641 4 h after dark 10.339737 8.748069 11.931405 8 h after dark 11.416592999999999 8.55724 14.275946 12 h after dark 6.528431 6.528431 6.528431