I have the original planted+ and this on my 36. Finnex def is brighter. Vivagrow emits warmer light. With the finnex together It is def great. I dont think it will be good by itself not unless you plan to grow low light plants. For what you pay its good.I Attached some pics, not sure if you can see the diff but it in person, it is very obvious that the finnex is brighter. For a supplemental light i think its awesome.