Well. I have a ten gallon tank. I had the fugeray before, it was ok never grew anything fast though. Then I added a marineland single bright to that and it was a little brighter not by much,
Recently a friend have me his p+ light because he got a Bml for his 20 tall
I traded off my fugeray and I'm going to trade or sell the single bright,
And for my tank at least it's a huge difference. It's like two 16" fugeray so combine. The reds and blue led light bring out the color in the plants, and the white brightens it up very well. Depending on your tank size you may need more than one. I think for a ten gallon and a 20 long being how shallow they are one is perfect but getting into 20 talks and higher you may need two