My light timing is in my second post of this thread.
Uploading a picture isn't possible at this time, but the tetras seem to be doing great. The mollies even had a bunch of fry, which I moved to another tank. All of the fish are doing great, I just wondered if the growth was standard algea or if it was some kind of fungus that shouldn't really be there. No, the tank is not near a window. It's in a basement-like setting, with only a small (1 foot tall) window on the other side of the room.
My semi-educated diagnosis would be just brown algea... I'll more than likely pick up a small pleco to help keep stuff clean.
My filter cartridge is clogged by the end of every day, probably because of this growth, but all I have to do is take the cartridge out and clean it. I'm not concerned of this affecting the bacteria colonies since there is also a sponge medium meant for the bacteria, the cartridge is just for waste and the like.