I have (4) of their 30" planted fixtures on my 135gal. I should've gone with 36" as I forgot about my center brace. So, they built me (2) nano strips to go in the middle to prevent shadowing.
Expensive, yes. However, only the up front cost is high. They pay for themselves quickly over the Coralife 384W power compacts I had before. The bulb replacement costs, energy savings is 42% for me, and not mention no more nagging fan noise and a ton of heat.
I love them. Nick from bml is figuring up my PAR as we speak. I need this data.