Question about lights
- Thread starter gitty44
- Start date
cowell
Well-Known Member
Based on a 4X4X6 room (sorry I guessed at height)
Minimum Lighting 25 watts Per Square FootLighting
The minimum recommended lighting for your area is 400 watts
Ventilation
The minimum flow rating of your fan should be 80.0 Cubic Feet per Minute (CFM)
Power Requirements
This setup will require 4.3 amps to be available at all times for safest operation*
The optimum reccomended lighting for your area is 640 watts
Ventilation
For optimum ventilation the flow rating of your fan should be around 88.0 Cubic Feet per Minute
Power Requirements
This setup will require 6.9 amps to be available at all times for safest operation*
The maximum reccomended lighting for your area is 960 watts
Ventilation
Going this way you will require a fan with a flow rating of at least 104.0 Cubic Feet per Minute
Power Requirements
This setup will require 10.4 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
I think you could get away with the 1000 Watter properly cooled... The program I use for calculating grow rooms doesn't take certain variables into concideration...
You could always make your room 5X5 and the 1000Watter is optimum.
Minimum Lighting 25 watts Per Square FootLighting
The minimum recommended lighting for your area is 400 watts
Ventilation
The minimum flow rating of your fan should be 80.0 Cubic Feet per Minute (CFM)
Power Requirements
This setup will require 4.3 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 640 watts
Ventilation
For optimum ventilation the flow rating of your fan should be around 88.0 Cubic Feet per Minute
Power Requirements
This setup will require 6.9 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 960 watts
Ventilation
Going this way you will require a fan with a flow rating of at least 104.0 Cubic Feet per Minute
Power Requirements
This setup will require 10.4 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
I think you could get away with the 1000 Watter properly cooled... The program I use for calculating grow rooms doesn't take certain variables into concideration...
You could always make your room 5X5 and the 1000Watter is optimum.
littlewing
Active Member
is this program available to anyoe else, where u find it?
like to calculate my grow box, just for curiosity,
very good answer and info +rep
thanks mate
like to calculate my grow box, just for curiosity,
very good answer and info +rep
thanks mate
cowell
Well-Known Member
4X4X7 made no difference, #'s I gave you are what came back with the new dimensions as well... bear in mind I don't think the program offsets things like air cooled hoods or cool tubes, or running a/c.. so that would be if you just had like a blower fan running the air out of your tent to cool the whole thing.
That's why I said you should be fine running it in that space. and if you were building you could have added another foot, you can't...no biggie right?... anyway, good luck !
That's why I said you should be fine running it in that space. and if you were building you could have added another foot, you can't...no biggie right?... anyway, good luck !
Green Cross
Well-Known Member
400w is good for about a 2 x 2.5 foot footprint
I'd go with a least a 600w
If you can afford a 1000w and all the cooling that goes along with it, go for it. That would be 83 watts per square foot, which is a lot, but not overkill IMO
I'd go with a least a 600w
If you can afford a 1000w and all the cooling that goes along with it, go for it. That would be 83 watts per square foot, which is a lot, but not overkill IMO
Brick Top
New Member
A 400-watt light will handle a 4’ X 4’ footprint but I would still go with the 600-watt unless there was some unalterable limitation stopping you.
　
Maybe I missed it in some message but how much height do you have to work with?
What is your actual usable height? You know, the distance from the floor to the ceiling minus the distance from the floor to the top of your growing medium minus the distance from the ceiling to the bottom of your light when it is raised as high as it can possibly be raised minus the minimum amount of distance needed to be maintained between the tops of your plants and your lights so you do not have heat issues/burned/cooked leaves/tops ….. so how many feet/inches of actual usable growing height do you have to work with?
　
Maybe I missed it in some message but how much height do you have to work with?
What is your actual usable height? You know, the distance from the floor to the ceiling minus the distance from the floor to the top of your growing medium minus the distance from the ceiling to the bottom of your light when it is raised as high as it can possibly be raised minus the minimum amount of distance needed to be maintained between the tops of your plants and your lights so you do not have heat issues/burned/cooked leaves/tops ….. so how many feet/inches of actual usable growing height do you have to work with?
littlewing
Active Member
try this,
http://www.uk420.com/growroomtools2.php
http://www.uk420.com/growroomtools2.php
skunkman98536
Well-Known Member
more light NEVER killed my plants 
cowell
Well-Known Member
more light NEVER killed my plants
That begs the question as to whether you had enough light too.
Just to play devils advocate, but alot of people try and get away with as much as they need, and not more. If you are different, you are the exception, not the rule.
