Need A Little Help

Hi Everyone 1 Im New 2 This Was Wondering If Any 1 Has Grown A.m.s. From Greenhouse, Would Like A Little Help Not Sure When 2 Put Mine Underneath The 600w Lamp ,how Far Away, Length Of Veg Period,and Any Other Pointers Would Be Much Appreciated.
Thanks

wait till its got 6 internodes before you put it under a 600W keep the light a good 2 feet from plant. not sure but i think a.m.s, is indica domminant so veg for 1 month once you get it under the 600w.