Personly i find it better to use metal halide (mh) for veg and high pressure sodium(hps) for flower stage,, but some duel spectrum lights are good enough for a small grow room...
I would keep your seedlings on 24hr light for a few weeks into veg some people say it dont make no diffrence giving them a few hours dark every night but I find its better to keep them 24hr in the veg stage,,
If that 1st pic is of 1 of your clones i would start flowering them now, there is no need to veg a clone for weeks becouse it takes the age of the mother, clone it, root it, veg for 2 weeks then flower to maturity,,
If you Veg a clone for to long it will stretch and have a impact on the end result,, Hope this helps,, happy growing!!