The issue is soft-proofing... Mine were dark until I went through the soft-proofing process... That corrected it.
Soft-proofing is a process of using a color corrected monitor to begin with, and then your editing program using your expected paper's ICC color profile... Paper has different white scales... and simply slapping ink on different paper gives noticeably different colors... some extremely different than what your color corrected monitor is actually displaying... IOW, what you see on the screen is what you should get on paper... That isn't usually the case without making soft-proofing adjustments...
There's a web site Luminus-landscape.com... They have a series of tutorials on adjusting and soft-proofing your images for printing... as well as other serious articles on the technical aspects of paper, and producing a finished image...