Ahhh ok, i spoke with you last night. I just saw your cab pics. Firstly, The 2 smaller bulbs are going to do nothing to help your plant where they are. If you cannot figure a way to move them closer and even if you can, get some mylar to cover the walls of your cab for reflection. You can get a mylar safety blanket in any camping/sporting goods store very cheaply. If you must you can use tin foil, but put the dull side facing the plants and make sure it covers the wall smoothly with no lumps or bubbles.
Secondly, I thought you had decided to go with MG? If you did you have no need for nutes at all until at least 3 weeks into flower. The perlite is an aeration compound. It helps retain moisture close to the roots, keeps air in the soil, and aids in drainage as well. If you use the MG perlite in combo with the potting soil, you are very much set for nutes until the time I mentioned above.
I guess you decided against taking the trip to the hydro store huh?