Low light issue

Seeing the light helps a lot. 6700K is deep into the blue spectrum, exactly what you need for veg. 96 wats of T12 will cover the minimum requirements for 4 square foot. Anything less it will start to get lanky. That spectrum works well for veg but not ideal for flower production. So it will suit your need to revege just fine. The bulbs being so close together is making an intense light hot spot. 12 inches should work better with that bulb arrangement in veg.

Always interesting watching the plant turn into a mutant as it revegs.
 
The photos do look like small auto-flowers but according to msg #8 the seeds were photo-period. Some of the other msgs give the impression that the lower electrical lighting levels and being in a window with autumn approaching caused them to start flowering as soon as the plants became mature enough.
They truly appear not to be mature enough, if they are photos. If they were just getting light from the window, and they are indeed photos, then it's possible they could be flowering photos. Any full spectrum artificial light during the natural dark hours would keep them from flowering.

I am thinking that if the plants are to go back to a vegetative stage it will take some stronger light levels than what the Coralife aquarium light will be able to provide. Might have to put under a 20 hours on and 4 off schedule.
If they are photos, only a low wattage full spectrum LED bulb would be required to go on briefly in the middle of the night, to keep them in veg. This is called "night interruption" (formerly known as gas lamp), and this is what I use in my veg house.
 
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