The amount of light is going to make a difference Auto or not....With Autos the duration is the thing not having to cut it to 12/12 to force flower, can give 20/4 throughout (whatever recommended). Well at least thats how I understand it. Never grew an auto....but from what I read I know there are limitations to autos. Typically less yield (smaller plants), not as potent (in general), and less control of your plants. I know a lot of people start with autos because all you do is plant it, water it, feed it and let it do its thing. Personally I would add some extra CFL for side lighting.