I'm using an ecobulb plus soft white 60w. It's says 13w but equalivent to 60w. I have a 20gal long with java fern and needle sag(not dwarf). Will this be too much light?
Is this a spiral CFL? If it is, the way it Is mounted drastically changes the PAR.
Is this a spiral CFL? If it is, the way it Is mounted drastically changes the PAR.
aqua_chem is right. When people say watts per gallon, usually they mean fluorescent light be it T8, T5, T5HO, or most likely in your case, a lamp with a 13 watt bulb. You are technically at about .65 watts per gallon, which is very low, but if you place the java fern directly under your light, it should be fine.