Hay. I've been using the same type of setup. I have a Phototron 6 which has 6 - 55 watt cfls and I drop in another bulb that came with the system durring veg. I've gone through 3 cycles and have finally (barely) got it right. My first and second tries I let them get WAY TOO BIG before going to 12/12 and they both yielded zero usable anything. By "WAY TOO BIG" I mean 1 foot tall. This last time I only went 3 weeks, yes only 3 weeks before going 12/12 and they still needed to be bent...alot of bending, but the buds are looking good. I've got pictures in my profile images. I'm going with a Lowryder cross next which I'm thinking will be perfect for the Phototron. I'll let you know how it goes.