I actually do want to keep them shorter. don't plan on vegging any more than 5 weeks. I'm not looking for huge yields. Just an experiment for me. Something to occupy my time with. Which is why I went with the cheaper CFL option. here is a pic of 2 of the 3 plants. The 3rd is a master Kush plant too and is basically identical to this one. The NL plant has actually responded favorable to all changes, its branching out pretty well. Its the master kush that seems to have stopped growing. still the plants seem to be super healthy.