The difference between 6700K and the 10000 is the spectrum of light produced. Some bulbs are made specifically for FW plants, some are for hard corals, etc. Even if you don't get complete glass tops you could get a suitable-size piece cut to place under the light. Just make sure you get 3/16" or thicker, thinner glass will actually bow (not to mention being easier to break.) I went to my lfs and bought the center hinge and clear plastic for the back (sold as replacements for glass tops) then had some thicker glass cut to make my own covers. I epoxied some cabinet pull knobs on for handles.