I have had a very similar looking problem and honestly i believe you may be too close to the light at the moment, although your room temps may be low they can rise quite a bit close to the CFL and this looks like the plants natural way to cool itself off and trap more moisture.
If it were anything but a heat problem i would probably suggest a little cal-mag as a slight mag def might be the only other thing.
I moved mine outside for a bit untill i could sort out my temps a bit better and all the new growth is looking extremely healthy.
Just try and keep your fan running on the light or between the light and plant and not directly on the leaves.
Good luck buddy