I agree with everything Lucifer said. You might shop around the net because I've seen fairly cheap 150w HID lights with reflector for around $150 or cheaper.

Sun System 4 150W HPS Enclosed Grow Light - Plantlighting Hydroponics

150w HPS shouldn't give you too many heat problems, at least none that a typical box or oscillating fan won't cure.

As far as strains, are you planning on ordering online? Most seed banks have good descriptions of flowing time and whatnot.
willonia Reviewed by willonia on . First grow in Prep - Advice needed. Hello all. I recently decided I am going to grow about 2-4 plants in my wardrobe space. It is H x W x L ( Metres) 1.3 x 0.7 x 0.5 I am unsure as of yet whether to go hydro for my first grow or just normal soil. Rating: 5