Id reccomend going 18 hours on and 6 hours off for the veg stage, that should work better than 14 hours on. Some people do differently like 24 hours on and no time off for the first few weeks but Id go with 18/6. Hopefully this helps.
I believe it's 18 hrs of light - 6 hrs complete darkness for the first month, or until the plant reaches around a foot or foot and a half tall, then it's onto flowering.
I grow 24 on . . . 18 or more for veg.
The longer it's lit, the faster it should grow and the tighter/closer the node's will be, but the more stressful it is on the plant, cuz' there is no usable 24 hour sun.
i'd say 18/6 unless you are growing an auto flowering strain...i've had really good luck with 24/0 with auto flowering strains atleast for the first couple weeks.