A couple things I don't like about this fixture.
One is that the LEDs are not very powerful per led
. I believe that this makes a difference. Think of it in extremes. Would laying an LCD tv be a good light for an aquarium, I'm sure they have 30w of LEDs in them. Or a single 30w led
emitter? I don't like either I'd like 10x3w emitters.
Another thing is the heatsink doesn't look right for 175w of led
light. I can't really see the back of the fixture, but it doesn't seem to have cooling fins, and as tightly as those are packed I would really be wondering how hot that thing would get running 12hr plus without much airflow. But since they are so low power, they may be ok, but still.
It would probably work, and I'd say he has close to $100 in materials so the price isn't too bad. But the design isn't my favorite. I would look for something built with 1w emitters on up.