I have a 75 gallon tank with a single 30 watt T8 light bulb. I have two anubias several java ferns and one amazon sword. The sword looks like it needs more light but the other two are doing fine. The sword has been in the tank since October and has lost some if its large leaves. Some time in Nov. I did add a flourish plant tab under the roots so I am assuming it is looking a little down because of the lighting.