Watch for gnats. Happy Frog is known to be laden with fungus gnat larvae. After my last fight with gnats, I refuse to use HF indoors.
FYI: If you start seeing what looks like dust particles zipping around under your lights, Mix one part 3% Hydrogen Peroxide to 4 parts water, and use it in a spray bottle to mist the very top layer of your soil until it's a little wet. Repeat every other day for two weeks.
Everything's looking great so far, man.