600w vs 400w

[aphrodisia]

Trying to decide. A knowledgeable buddy is urging me to do 600. Everything I've read says 400 should be adequate for my floor space (4x4). He does consulting jobs too and such, basically says he's not been impressed with 400w setups he saw, that the 600 just do so lunch better.

I not really trying to get more than an ounce or two at a time. The price difference is substantial enough to me that the 400w still seems most advantageous, but the way he talked about the 400w wouldn't even be worth it.

When I was running my 400w in a 3.5 x 3.5ft space I was averaging 2oz per plant if I grew 3 or 4 plants and 6oz if I grew just the one plant.