HAHA, didn't get that OD part before. Sounds like you are using those inexpensive LED panels eh? They should work fine if you're growing in a space that small and have some supplimenting on the sides. I like the red panel on the side idea, though a couple blue LEDs wouldn't hurt.
You are right in saying that peoples lack of success is from LEDs not being intense enough. That being said, adding a whole lot of LEDs to to mix will not make for more intense light, just more light rather. A lights intensity directly associated with its penetrating power, and LEDs just aren't very intense. Now to increase the intensity (penetrating power) of an LED light, you would have to replace a lights 1 watt LEDs with 1.5 or 2 watt LEDs, this will create a brighter light with more penetrating power. ADDING MORE LEDs, on the other hand, does not increase the intensity, but widens the grow area. Putting a 1 watt LED next to another 1 watt LED will not make the light from the two LEDs penetrate further than they would alone, however, your light coverage from right to left just increased as you expanded the length of the light source.
That all being said, you should still be able to OD your grow area just fine, just wanted to throw some more info at ya so you can figure out how to best use all those LEDs!