is 400w hps enough to grow in 12q feet?
- Thread starter weedpot
- Start date
Little Tommy
Well-Known Member
That is what I have and irt works well. The other thing to consider is penetration. The penetration is a matter of how tall the plants are going to be and the ability for the light to penetrate all of the bud sites. I have found that topping and LSting help with the 400 watt HPS.
keico
Well-Known Member
Use this chart which shows coverage based on bulb wattage
Attachments
keico
Well-Known Member
Topping means to cut the main branch so that you have more than one.
This slows down growth as the growth hormones become spread out over now having more than one main branch
For LST read this FAQ https://www.rollitup.org/view.php?pg=faq&cmd=category&id=110
cowell
Well-Known Member
I think that chart is off a bit.(looking at 1000 watt coverage only - optimal is 4X4 and can go 8X8 not 10X10)
The 400 should be just fine as already stated by ^^ posters.
in12 ft2 you are looking moreso like this..
Minimum Lighting 25 watts Per Square FootLighting
The minimum recommended lighting for your area is 300 watts
Ventilation
The minimum flow rating of your fan should be 70.0 Cubic Feet per Minute (CFM)
Power Requirements
This setup will require 3.3 amps to be available at all times for safest operation*
Optimum Lighting 40 watts Per Square Foot
Lighting The optimum reccomended lighting for your area is 480 watts
Ventilation
For optimum ventilation the flow rating of your fan should be around 77.0 Cubic Feet per Minute
Power Requirements
This setup will require 5.2 amps to be available at all times for safest operation*
Maximum Lighting 60 watts Per Square Foot
Lighting The maximum reccomended lighting for your area is 720 watts
Ventilation
Going this way you will require a fan with a flow rating of at least 91.0 Cubic Feet per Minute
Power Requirements
This setup will require 7.8 amps to be available at all times for safest operation*
Additional Comments
Getting to these points and or over it is highly reccomended the grower use Co2 in their room as your plants will only be able to photosythesise a certain amount of light before needing a Co2 boost to benifit
MrBlanco
Active Member
Great pic and extremely helpful.
keico
Well-Known Member
Where are you getting your info from ??
cowell
Well-Known Member
It's on this link at canniversity click "os grow calculator" at the bottom feed in your dimensions and it provides you feedout info that I just copy pasted for a 12 ft2 room.
http://www.cannaversity.com/cannaversity/idx.php/22/051/Lighting--Electrical/article/How-much-lighting-do-i-need-.html
also there are alsoposts in the FAQ's regarding lighting footprints for bulbs..
https://www.rollitup.org/view.php?pg=faq&cmd=article&id=59
Thought I'd post both, I didn't know which statement you were asking about. Hope that helps.
cowell
Well-Known Member
http://www.head-nature.com/05236.html
one of these?
I don't know of any reason why you couldn't use it. Possibly if someone knows that you shouldn't they'll chime in to help you too.
smokinskins
New Member
enough!? is there ever enough?
keico
Well-Known Member
Yes cfl's must be close to a plant to be effective.
A 200 watt cfl is gonna generate a lot of heat
xxterminator
Member
i would go with a 600w hps for that area!
