We present new results from our test of Lorentz invariance, which compares two orthogonal cryogenic sapphire microwave oscillators rotating in the lab. We have now acquired over 1 year of data, allowing us to avoid the short data set approximation (less than 1 year) that assumes no cancellation occurs between the kappa(e-) and kappa(o+) parameters from the photon sector of the standard model extension. Thus, we are able to place independent limits on all eight kappa(e-) and kappa(o+) parameters. Our result represents up to a factor of 10 improvement over previous nonrotating measurements (which independently constrained seven parameters) and is a slight improvement (except for kappa(ZZ)(e-)) over results from previous rotating experiments that assumed the short data set approximation. Also, an analysis in the Robertson-Mansouri-Sexl framework allows us to place a new limit on the isotropy parameter P-MM=delta-beta+1/2 of 9.4(8.1)x10(-11), an improvement of a factor of 2.