OOPS when I made my post I was thinking of reef radiance. Doesn't matter most of the Chinese are made by the same company Evergrow including what reef breeders sells.
Most chinese fixtures I have seen don't have any optics like the reefbreeders. They just have led's on a reflective plate.
As far as enough light/to much light. I have a value fixture w/ 90degree optics and my RBTA walked all the way to the top, maybe 10-12" away from th fixture. I recently put it in a breeder box as it was starting to get to close to some sps I had up top.