I need advise on my 1st indoor grow and on my set up. 4x4x5.5

I took pics with my laptop camera so not the best quality but the 1st is my 4x4x5.5 box(top hat housing is on the top-center). The 2nd is the temp guage(top temp is interior). The 3rd is the top hat that houses my 400 Watt MH in a Hydrofarm Hood (you can see the top hat on the exterior pic of the box). The 4th is the inlet (not a great pic but it leads to just under my window for fresh air). The 5th is the interior of course, it shows all of the set up with the 2 air king small fans, The 6th is a pic of some of the 18 unsexed Lemon Haze babies(they were transplanted yesterday). The 7th is a pic of the bigger of the 2 larger females(an unknown purple strain, the bag I got em out of was some killer purple anyway.) The 8th is a pic of the biggest baby Lemon Haze. View attachment 2382453View attachment 2382454View attachment 2382455View attachment 2382456View attachment 2382457View attachment 2382458View attachment 2382459View attachment 2382460