Why do so many people come in to the CFL subforum and bash CFLs telling people to get an HPS... Its fucking retarded. There is often a cost and/or space issue that prevents people from doing it.
Your plants are looking good so far man. Its not advisable to start flowering and then reveg because it will stunt their growth for awhile.
Also youre going to want to move those to slightly larger pots or fill them to the top with soil. If you do the latter, youre going to want to lift the root mass and dirt, and throw more dirt underneath it because piling more dirt on top wont do anything really. The plant is going to struggle getting light or get root bound during flowering if you dont make a change.