Quote Originally Posted by Floyd R Turbo View Post

Fairly. I'm currently building one though that has 4 x 3W 660 and 1 x 3W 455 (half power) on each side of a 3x4 screen. It might be overkill.

I am not so sure its over kill depending on the light your display makes. I only say this because since I have taken my horizontal on the 10G and made it vertical I am getting green algae growing in my tank now. I updated my display LED light (7 3 watt 19000K) before (by about 2 months) my scrubber and didn't have any algae problem. I would however have slight runaway nitrate with the horizontal (up to 30PPM sometimes) and just correct this with feedings. Now I have taken the 4 LEDs from the horizontal and put two on each side of my new vertical. Since doing this my nitrates are great but I am getting algae growth in the display at a real good rate. I am going to add one extra to one side and see how it goes. My screen size is about 2.75x4.5" When I had all the LEDs on one side of a 2.75x6.75" screen I didn't have any display growth.