My Neville's Haze going into 12/12

Hello everyone. Only my second grow. Right Ive got 2 Nevilles going in to 12/12 tonight. Here's my setup - pure cowboy:

250w blue spectrum sunmaster
600w dual spec HID
Both plants are in a DWC
Using Advanced Nutes(Veg, Bloom and Boost)
No intake or exhaust fans
1m x 1m x 2m tent
1 Air mover

I know its not the best, but I grew 1 iced Grapefruit last time and got 4oz dry so I must have done something right.(more than likely ...