LED grow lights... input please.

[knna]

Another question: would it make sense to put a larger viewing angle in the middle and then decrease it on the outside. Lets say I create a circular bulb. Use 45° in the center, 30° halfway between the center and outside, then switch to 15° on the outside.

I think is a good idea when using circular bulbs. But i prefer a different aproach, consisting in slim linear strips distributed along all the grow space, thinking in 3D, and seeking for a even flux distribution over the whole plant.