I'm no LED expert. I think you can have low to medium light plants. Some nice ones that I really like are anubias, crypts and wendelov ferns. Banana plants are also cute. I have rocks in some of my tanks from all over, you just have to make sure they don't bubble when you put vinegar on them or you will alter the ph of your tank.
Things to avoid unless you want to alter the ph are shells and coral.
You can find interesting driftwood by waterways or order it from the net.