condition mean min max 4 h after light 9.133790000000001 8.728616 9.538964 8 h after light 9.385345000000001 8.948263 9.822427 12 h after light 8.931150500000001 8.6564 9.205901 4 h after dark 9.0732745 8.948263 9.198286 8 h after dark 9.516482499999999 8.641653 10.391312 12 h after dark 8.992303 8.992303 8.992303