1st indoor grow and 1st post any feedback much appreciated!

Hi everyone, I have just built my 2nd grow box and need some feedback on my specs, just to make sure im in the right direction with my first indoor grow......

-Box 4.5ft wide, 4ft tall, 1.5ft deep, divided down the centre into 2 sections
-Painted flat white
-8 42watt CFL 2700k on the flowering side
-8 42watt CFL 6700k on the veg side
-4 computer case fans 76cfm, 2 in each section
-2 fully adjustable shelves, 1 in each side
-The temp range is 22c to 27c during day cycle, 16c to 18c during night cycle
-Lights 18 on 6 off, 12 on 12 off flowering

My buddy gave me some feminized white widow seeds and I cant wait to get started on these girls or finished which ever way you look at it lol!!! Any advise or comments are much appreciated thanks

It all sounds good, how tall u gonna grow ur ww on the veg side b4 u flower

I was thinking of growing them roughly 1.5ft tall then throw them into flowering and use up the remaining 2.5ft.