Originally Posted by cowfish007
I'm setting up a 75 gallon tank (20" deep but will have about 3-4 inches of substrate, 18" front to back, 48" long). I do not plan on using injected co2, though will probably use Excel. I'd like to have a nice "carpet" on the bottom and fairly even light spread throughout the tank. Will one of the Freshwater LED + lights work or will I need two? Do these units come with a dimmer?
As stan mentioned, it will grow plants quite well but for a carpet, depending on which plant, it will take a while with just 1 light. You may want to use 2 lights to speed up carpeting.