I have one of those 17 watts ott-lites too for my vtfs it works pretty good, so far no complaints. It does say on the box that it is a full spectrum. I have been told that this isn't enough light though so I put some foil around my teranium. One way or the other it is deffinately better than those crappy other blue lightbulbs that are supposedly made for plants. And my plants seem to be loving it the red dragons are becomming redder and I take that as a good sign. Seeings how this is my 3rd lightbulb I have tried and the best so far I am going to leave it for now until I can get the "perfect" lighting set up.