Hoods often do not  put out enough "lums." I had a hard time with some plants until I got rid of the plastic hood and got a clear glass cover with TWO strip lights.

They make a  daylight  bulb that will also  help. That plus a grow light will often  do the trick. You should also leave them on 12 hours a day too.

Low light plants you MIGHT be able to get away with are sometimes sold as mystery bulbs. Cryptocryne are usually what you should get, and they are a very low light plant.

Not much else will make it until you get more light for the aquarium.