condition mean min max 4 h after light 8.11045 7.9925 8.29059 8 h after light 8.584413333333334 8.34789 8.94 12 h after light 8.418983333333333 8.206380000000001 8.67958 4 h after dark 8.22226 8.01108 8.45982 8 h after dark 8.24836 8.12987 8.338289999999999 12 h after dark 7.790183333333333 7.61959 8.04658