Of all the items I bought for my new setup, the one piece I am MOST disappointed with is the Nova T-5 Extreme. The fan is ridiculously noisy, and is hard-wired to the power brick - so changing it out is problematic. The entire unit is flimsy (the legs are more like tinker toys than a properly engineered piece of technical equipment). The plastic sheet that protects the lights from the salt water has warped, which indicates the noisy fan is under-engineered, and the LEDS are so dim as to be essentially non-functional.
I was originally shown at the LFS a unit by Coralife which was $300 - a full hundred bucks higher than the Nova. I should have bought it. You get what you pay for.
One other thing: If possible, don't buy lights online. The first Nova light arrived with only 1 bulb intact, the rest shattered into a zillion pieces (and to make matters worse, broken flourescents are TOXIC)... the second light arrived with 1 broken bulb - between the 2 of them I was able to hobble together one working unit, but I still hear broken glass rattling around in there. A regrettable purchase all the way around.