Originally Posted by thecatisontheloose
Those who used these lights, what configuration of led
floodlights can you recommend for a 140 Gal
freshwater planted tank? I am looking for medium light, dimensions are 5 feet length by 18 inches width and 22 inches height. There's a bar in the middle so it'll make more sense to work with an even number of fixtures. 2x50W? 4x30W? 4x20W? 2x30 and 2x20?
I use them and for medium light I would get 4x20W 6000-6500K daylights. One 20W daylight over my 20H is enough to get great growth from my HC which is a very high light plant. Anything more than the 20W may give you big algae issues without high CO2
and careful control of the water parameters. You may want to try 2x20s and see the spread but because of the fact that a single point light source can struggle with casting more shade, I think 4 would be needed. I had to add a 10W to my setup because the large driftwood blocked the light on the left.
Please let us know what you decide. I have no problems growing anything with these lights. The HC is VERY compact and low growing and spread fast even before I augmented it with the 10w.