Product above. I could only find one thread about this, and nobody mentioned having actually tried it. But for 55 dollars, that seems like a good price for LED lighting for a 20L. Naturally, my question is, will this be sufficient for medium-ish lighting? I'm probably going to give it a shot.
About 4 months ago I tried the LED puck type lights made for under counters. They do look good but I would have needed about 50 or so to have a chance at growing plants(100 gal. tank). I did end up buying the (6)Grobeam 500's and the light from the pucks looked yellow next to the Grobeam.
I have seen those Home Depot lights in person and they really aren't very bright, you would need several of them to even have a shot at growing anything but low light plants. For the money you are much better off trying to build a DIY fixture or going with a preassembled unit made for aquariums.