I don't pretend to understand most of this, but wouldn't some type of light scattering lens work better. I'm sorry for the non tech talk but I'm not well versed in this light/energy talk.
The algae growth is a good thing in a way. Shows good light.
Like I said, I don't know much about this at all.
---------- Post added at 04:17 PM ---------- Previous post was at 03:55 PM ----------
I was thinking. It hurts
Is there anything like a camera lens that can change the direction of the light?
I don't mean a actual camera lens but the concept
Like turning it to put the lighting in a larger or smaller circle?
You may be able to grow more then one plant under this light.
My 3W LED flashlight is WAY too bright to shine in the eyes.
There is an actual warning in the box saying don't let kids use it and don't shine in eye's.
It put's a beam of light 300-400 yards very tight.
I think LED optics have a way to go.