600 vs 400 need help

Ok so i think im ganna start a lil grow for myself
What are the differences in a 600 to 400w lamp
Amount of Plants?
Speed of growing?
Size of grow?
Anything else to help me decide will be awsome
what makes 600 better than 400? or other way around i have a decent size grow space i know either will be fine
Help
- CooP

the more light the better..both grows being even...the 600 will harvest more than the 400...it burns hotter tho 3' x 3' is good for a 600 to get a real nice harvest....

600Watts Hands down, at least 1-5$ more than a 400Watt per month to run. Alot of heat though.. Take your room Length x Width x Height = CFM and get extractor fans with inline ducting on a air cooled reclector that double or triple your rooms CFM in one minute. 6inch High Velocity Inline or some shit.

Thanks im thinking about going with the 600 whats the limit on plants to a 600w lamp??
Thanks- CooP

yeah I had a 400 for one grow then put a 600 in my tent now... lets see how much better yield I can get..

Depends on how you feel. 1 plant under a 600 will yield the same as 6 smaller plants under a 600.. but will take a few more weeks of veg for the 1 plant of course. but you can do it. no difference. I run two 600s and prefer 4x good bushy plants under each, then have smaller weakling plants based around thoes

Thanks man so is 6 a max limit? sounds good to me!