You look at grow journals using the type of lights you are interested in and see if the person kept those plants healthy. Then you can see what they yielded because most people list it at least with a photo and description. Asking people is great but when I want answers I go to grow journals. I did a bunch of grow journals on a forum that got shut down a few years ago and I haven't since then. I might get started on them again soon because if you want to help people that's the way to really do it.