i have 3 small plants i started from a good stash i had, they are about 3 weeks old and i have been keeping the light on 24 hours a day. now should i do the 18/6 for veg or stay with 24. and if i need to do 18/6 do i do that until flowering stage, i also wanta top my plants to so im waiting for the 4th set of true branches to do that. so what im looking for is a plan of attack please help me and i wanta know were to get the high pressure sodium bulbs, can i buy at menards or something and would that be a red flag for the 5 0.