@dallasg, I just know you need to get your hands on the 510Wok i am getting more interested, i have a large tank to cover
when will you have pricing?
How i see it is that 2x 85w units will be better as you will have a more even spread.
By using 2x 85w units, you can easily cover (30cm|85w unit|60cm|85w unit|30cm)
With the double unit, the clusters are closer together so it might not give the spread needed for t 1.2 metres but the penetration of the light will be deeper. (50cm|170w unit|50cm)
* Brackets depict Side panes of the tank.
Wich units will I need andre. And howmany .my specs 2m x 400 x 400