Based on: http://www.plantedtank.net/forums/li...tml#post904062
it looks like you will have 60-80 micromols of PAR, which is in the high medium range, and with that much light CO2 is almost necessary, if not necessary. (This is assuming you have the lights on each end of the tank, so they make a row across the tank.)
Thank you Hoppy. Without your help I would have no idea because even looking at that chart just now, I am lost. I will see if they have the same type of bulb and color in 10W so I get 20W total light to prevent the need of CO2. The only reason is because I want to raise and breed CRS and CO2 could potentially become harmful to them unless I can get away with 1-2 bubbles per second at most with this lighting, would I?
PS: Yes I have the same fixture mounted on the other long end of the tank so that they are facing each other.