Those brains would look better and healthier with better lighting IMO
. I would but anything like that under those power compacts but that's just me. I'm not start a pissing match with you over lighting of the bio cube and what you need for what corals. Point is... You have those corals yes. Are they surviving? Yes... Are they thriving? IMO
To the OP if you want healthy looking corals with amazing colors and a thriving tank either upgrade the lighting or stick to what will work in the tank under the stock conditions.
Of course water parameters, salinity etc all play a HUGE roll as well as tank maintenance.