With the way it is now, and with what you said you wanted to add, I am sure it will be fine for all types of corals as long as you placed them properly. SPS corals will certainly grow fine if placed under the modules, and LPS and softies will grow in the dimmer areas. My corners are pretty dark on my 60G and candycane corals grow the best there, under about 40 PAR.
On the bacteria topic, maybe down the line once I see where all my testing leads me, I can design and build a special photobioreactor designed specifically for phosphate loving bacteria like they make for algae now. That way I can fine tune the flow in order to be able to have greater control over bacteria populations in the reactor. The way I am thinking now with adding the lower 400nm range to the display is more akin to vodka dosing where I am using the entire display to grow bacteria population by providing it with a better spectrum and hoping it is the phosphate eating bacteria that likes that spectrum more than other types. Early results seem to favor that hypothesis, but it is still very early in my testing. There are thousands of types of bacteria in a tank, so there is a lot of hoping on my part that I can find a specific light spectrum that matches with a certain bacteria preference and that bacteria being the type I want to grow more than others. This is where lots of testing and careful measuring of input/food comes in to play to make sure I have good data to go off of. Hopefully once I figure it out I can make a small unit the size of a calcium reactor but with near UV and/or IR LEDs around it and fed via output from a scrubber. Internally would be similar to a de-nitrate coil but it would use larger diameter clear tubing coiled up instead of small black tubing. Since the light that it will be getting will be almost out of the visual range there should be no algae buildup to worry about in the tubing. We know how a de-nitrator coil works, and we have a good understanding on how most of the algae works that we are growing in terms of N/P removal, I would like to find a way to use what I have learned to now make an ideal home for phosphate loving bacteria to grow in my system, and I think my idea is a good start but there is a long way to go.