[quote=GrowTech 47 what a month?
thats how much it cost me to run my 400 hps 18 hours a day for a month thats my whats added to my bill 47 dollars a month when its on for 12 hours it only cost 29 dollars so im thinking on buying a 250 or 150 for vegging ill leave that on 24 hours i wouldnt buy a mh or conversion bulb bcause they burn out quicker than anyother light and floros have about the same amount of light output hps is the way to go

ill just settle for 1 400hps for my first plant. i need to experience this thing called 'trial and error' [=[/quote]
U CAN GROW WAY MORE THAN 1 PLANT UNDER A 400 WATT HPS RULE OF THUMB 50 WATTS A SQ.FOOT HOW MANY PALNTS CAN U FIT IN A SQ FOOT AND HOW TALL R U GROWING??