which is the better light setup

A: 400 watt HPS lamp
B: 250 + 150 + 70 watt HPS lamps

haha good luck with that everyone thinks their setup is better or more efficient. wish i could help.

A . . . . any day. Grow fewer but bigger plants, more and denser bud with it.

You answered your own question I believe.

I would agree with Hotrod 90+ % of the time. There are "some" circumstances where B may be more beneficial. Room/grow area size. Ventilation/cooling, size of plants, style of grow, etc. If you want to give more info on your particular situation I/we could try giving you a better informed "opinion"..

^True. Would also like to add that a 70 watt HPS isn't as efficient as a 250 watt HPS... which isn't as efficient as a 400 watt HPS. Pretty sure the 600\800 watt systems are the most efficient (most lumens per watt), with 1000 watt bulbs being slightly less than.

Use them all....a and b.

Keep it simple. Less equipment = less bulbs to replace = less failures = less headaches

A) 400HPS - That baby will take care of business

Go bigger!!!!!!!

Use them all ofcourse silly
More light= more bud.. use them smal lights as side lighting