The posts above kinda answer your question. How much are the seeds worth and how special are they to you? If they were bag seeds, I would just toss them, might be hermes or males for that matter.
You can veg a plant for a really long time under low light like youre asking and cutting back on food and water will help slow the stretch that comes with low light conditions, also a toping or trimming will help with the size of the plants after veging for 8 to 10 weeks that will be needed to finish the other clones.
Veging seeds for 8 week and allowing to grow untamed, the result is going to be 6 to 8 footers after the stretch from switching to 12/12, are you able to grow 8 footers? Or its time to go shopping and splurge on all that new grow equipment you have been wanting and start perpetual grows. 2 cfls will not be enough light after 4 weeks.
You could also grow the seeds out for a few weeks and after they are a foot high put them into flower with the clones, the possibilities are endless.