The white diodes put out too much yellow and red - this is why some lower depth coral can get torched by them (not too much light as some suppose), yet some coral close to the surface are OK since red and yellow is very strong in shallow waters. Consider this bad-spectrum in addition to trying and fill in the spectrum gaps. Turning the whites way down, which most people do anyway, is a good way to combat this, but there still can sometimes be too much of the wrong kind. If you want to really help your coral out, you could run about 15-20% of the whites that come in the fixtures, rely on the blue and then supplement back in with the coral plus to fill out the higher part of the spectrum. What you will end up with is LEDs that are only really good in pockets under 500 and T5 for the rest. ...but then you will need to probably kick in some blue plus to fill in the gaps where the blue LEDs leave holes. If you get started on this, I might suppose that where you will probably end up is filling the whole spectrum with T5 by then adding in some actinics and just having the LEDs be for some blue or dusk/dawn with the roles reversed of the LEDs supplementing the T5s.
