Lighting

how many watts do i need for 4 plants?

Generally, 50w per plant

YEA, I'd agree 50 watts per square foot/plant is Best.

apreciate that fellas

What kind of light are you using?

50w per plant. thats bollocks!!! If u veg 4 plants for a few months u could get 3 or 4 OZ dried weed per plant, using a 600w HPS High pressure sodium.