150w hps vs envirolight 400w

im thinking of starting mw next grow in a few weeks.
unfortinatly over head space is limited. does anyone know which would produce better overall yield. out of the 150w hps and 2 x 200w envirolite.
i was thinking it would be the 150w hps.has it has better penetration.

can anyone help!

thanks guys!!!!

 

I'd say 2*200W envirolites 400W in total would give you a much better yield than a 150W HPS.

 

I agree, go for the envirolites they cheaper to buy and run, and a far more efficient concerning Lumens and K. This is the manifacturer's direct sales shop, it's the cheapest place to get envirolites: http://www.growlightsdirect.com

 

Not quite there £13 cheaper here.
http://www.theonlineelectricalwholesaler.com/catalog/products.php?cpath=88_254_256