I went to LED cause I was tired of spending the $$ on T5 bulbs.
My current config is: 1 VEGA blue.2 AquaBeam 600 Ultima - Reef White twin 18'' strips and
2 50 w bridgelux chips on 6'' MakersLED heatsinks.

I like the progamming fratures of the Vega but am not impressed with coral grouwth.
The 2 Aquabeam strips put out a lot of light for the numberof LEDs and I use this as a hgh noon boost. Nice lights with a 5year warranty.
The 2 50w chips on heatsinks add that nice blue look.
The best grouwth I ever got was with T5's on my 28 nano with a 6bulb T5
I just bought 2 coral pro fixtures from Reef Radience to replace the 50w chips cause they have UV in the spectrun mix and thay had a Xmas special price. This gives me some backup lighting for just in case also. Im with Allan the black box fixture seems to grow just as good if notbetter the the high price fixtures.