Does any one know about the most 600 watters u can use on a regular house breaker box I'm in SoCal and rent so building a designated box is out of the question I've heard 4 is the most anybody else heard that?
if you have a 200amp panel on your house, you have to look outside to see what size transformer your drawing from..., then you can do a "flip", with no more lights than the Transforer is... for instance... a 15Kw transformer is standard... so assuming that your house is the only house serviced by that transformer (and it's prob not) , you could do 15 1000w lights, at a time, or 30 lights total... or 25 600w lights on at a time, for a total of 50... you'd move to a 11hr flowering period to leave 1 hour off between the flip... to let the transformer cool....
at 1.5-1.7x the transformer you take the risk of it overheating on a hot day... at 1.8-2x the transformer will blow, the fire department and police will show up...
if your neighbors are on the same transformer, asume they may be using at least 35% of that transformer at all times... if you know they're growing... assume 75%
now if your trying to figure out how many lights can be on a standard 15a breaker.... I think Truncheon answered that...