Thanks, I really like your design as-well. I think I watched your video 10xtimes, in order to come up with my design.
The kit I purchased did not come with a dimmable option, I might in the future go for it. In regards to the optics I think your right, I'll probably keep optics on the "angled LEDs" to try to "push" as much light as possible into corners of the tank.
interesting concept, although you may find there is no need for optics, keep us updated.
ps: they will be dimmable?