For 6 plants you will need a lot of light and much more space than you have available. I would suggest growing less plants.

The good news is you have plenty of vegetative light! That 400watt MH will be more than enough for your grow space. The only problem I see is heat issues. You have to keep that MH cool or you'll burn your plants.

You have to pay close attention to your light spectrum. It's not about the amount of light you give the plant. It's all about what kind of light you give it and how much of that light is active PGL (aka PAR).

Here's the deal with KELVIN (light spectrum) : http://boards.cannabis.com/indoor-li...t-subject.html

I'de suggest that since you have a 400watt MH you mine as well save up some money and get yourself a 400watt HPS to go along with it. If keeping the heat level down isn't an issue I highly recommend using both at the same time.

ALWAYS REMEMBER THAT USABLE LIGHT FOR PLANTS DEMINISHES BY 1/2 FOR EVERY FOOT OF DISTANCE IT TRAVELS!

So if you have 20000Lumens RATED and your light is 2ft away from your plant/s, you're looking at only 5000Lumens reaching your plant.
GRB.4.Life Reviewed by GRB.4.Life on . Some info please? I been reading alot on here and have a few quick qestions. Woundering about 6 plants growin in soil lst no topping 2x4x8 size I got a 5 foot floro light with 2 tubes and room for 2 CFLs at the ends that my dad used to grow roses and stuff under. Is this good enuff for vegging or should I switch over to 6 or 12 CFLs? im sorry it was free i dont know the watt of the light ill check the bulbs again latter see if i can find anything. Also for flowering my freind got a 400w mh shop light Rating: 5