Thanks, I'll check out Lowes. I've looked there before, I don't remember what size I needed then but they didn't have it, well maybe a weird spectrum (2700k?). Then I'll check Premium, I don't need anything "special", just to grow medium light plants & make my fish look "normal". I have both old 6500k & 10,000k PCs, either are ok, I lean toward the 6700k (ish), better yellowish than too hard blue/white I guess, but like I said old bulbs...
The difficult bulbs are actual "30" inch T-5 NOs, not 24 inch HOs. I need to measure, as some sites, like Hellolights, list actual bulb length, not "fixture size", better as MANY 30" fixtures actually hold 24" tubes, not mine, that's what I liked...until now...