If growing outdoors and need stealth/small size go with a lowryder as it will auto flower due to age......If growing indoors where you control the light schedule you can open up your options quite a bit.....I have done white widow at 12/12 from seed as well as joint doctor's lowryder at both 18/6 and 24/0...........The WW has topped out at 13 inches tall, I have about a week left before harvest, but already the quality diff from LR is apparent.

Lowryder, or any ruderalis strain, does not come in feminized due to the auto-flowering....however I had a good ratio of female/male with my experience, about 70/30.

So IMHO it is better to choose a strain you are interested in by it's indica,sativa,taste..charecteristics and then just growing under 12/12 from start to finish...