hi i'v just started growing and would like any one to help me answer a few things i have 6 plants under 1 light i veged them but did't really know what i was doing i was winging it as i think most do on there first grow they only got to about 12" tall when i swaped over to 12/12 they look healthy and are buding but its been 3 weeks on 12/12 and they just seem small and undevelped still only 12" tall is this a comon mistake is there a reason for this i'am abit at a loss as to know what to do