lights

I want to inject c02 into my 6 10 gallon neo/live bearer/fry tanks. I want to have a lot of cover for my fish and shrimp but don't have a ton of cash to do it. Any suggestions on lights that I can get and goo fastish growing plant suggestions that I can get for my tanks? I was also wondering if...

What are good options for at least good medium lighting for a tank 30" deep? Probably 25-26 counting substrate, etc. Low tech at first, maybe a decent CO2 system later. Most likely going to be a South American tank...