i've found increased lighting in a freshwater tank seems to put a damper on brown diatom algae.
doesn't seem to be the case with my new reef tank though.
those fixtures seemed awesome at first...like half the price of any others out there.
then people I know ordered them, and they arrived in non-working condition, and seem pretty cheaply made. One person returned theirs for a refund, rather than an exchange.
The other issue is that the various fixtures aren't using standard PC
bulbs. I've never seen 40watt PC
's until they started to sell these fixtures. replacement bulbs could be a huge issue.