Is it 60 par through water? As in, you tested it with a PAR machine? Or is that through the air? I believe that there is a huge difference as PAR gets a lot less as it goes through the water. As long as you like it and it grows plants, then it is absolutely fine. I would imagine, though that since it is made for plants grown in pots, it may not be that powerful when run through that much water. 10 inches isn't a ton, but, it will make a difference. The color spectrum looks right for growing plants, I would personally like a little bit more blue in it, but, that's just my personal preference. I guess from a theoretical standpoint, it should grow them just fine. I'll be curious to see how this all pans out in a month or so! Good luck!
I have always seen a ton of grow lights that are more in the red spectrum on Ebay and Amazon and kinda wondered the same thing, if they would work for my tank, but, never pulled the trigger on buying one. Lmk how it goes, please?