If your asking it means you have alot to learn about growing......''
I have a 400w HDS with my first grows 5 at a time i got just under 5 ounces..............''
You would be shocked to know what i pull off 5 plants these days under my 400w HDS.
Learn, read, and read some more, and then you will learn some more. Like most things in life you only get what you put in. Good luck
