i seen them at macna and they had the small one setup on a small tank with a par meter, not bad numbers I was going to buy the 200 units but decided to go with a different manufacture because of the price than the next day they dropped the price ---my hold back was they weren't dimable with a controller
oh and yeah of course fans are available from me for replacement free of charge and they are super quiet for sure, I have to see them spinning to know they are working honestly.