I have a 12G Nanocube and it appeared the light burned out, but only after about five months. I went to replace it and it appeared to work initially, then I turned it off to put the plastic shield back on and by the time I was done with that, the light didn't work any longer. I would unplug it from the wall, disconnect the wire connectors and reconnect and every once in a while it would flash like it was trying to turn on (even unplugged from the wall)! Could this be a problem with my ballast? If so, does anyone know if I would have to replace the whole hood or just by a whole new ballast piece? Thanks for your help.