light cycles???

.. I have about 8, one month old little plants and I am curious about when to induce into 12/12, I am using two 42 watt 6,500K CFL lamps over them now. Which is about 6,400 lumen of light. They look gorgeous and are a good green color with no yellowing or discoloring. The bigger earlier leaves on the bottom curl a bit to the side which is odd and is not from resting at night. Probably just needs some nutes , Anyone have any info on when I could possibly start 12/12 or if I could take one a side and bloom it early?

I think you can switch them pretty much when you feel like it. Take in consideration that they will double in size over the flowering period. Finally, the more veg time, the more yield.