600 w hps for 2x2x5.5 too much or not ?SoG

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cyberweed

Active Member
I have a set up with pvc, and mylar a made grow tent i guess ,
My Question is can i use a 600w hps on 2x2x5.5 or is that alot of heat and how many good plants 2 or sog 12 ?
i dont have no money to buy another grow light so please any advice. Limited space for use only I rent room
 
Boneman

Boneman

Well-Known Member
You already have the light? What are your plans to cool it? Can you make the tent bigger?
 
Xare

Xare

Well-Known Member
Way overkill...

You wanna shoot for 50 - 70 watts per square foot.

in a 2x2 /w a 600 you are at 163

Make your space 3x3 that = 72.
 
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cyberweed

Active Member
can make bigger but guessin same problem how about 2x2.5x5.5
na huh , I have the light already cant afford another lamp so can i work with this space or like replyed before too hot?
 
Xare

Xare

Well-Known Member
2x2.5 is still 130 watts per square foot.

Above 70 is where you start getting diminishing returns. Meaning your plants will suffer from heat stress and the air will be too humid / hot.

You need a 250 watter for that size even a 400 is pushing it.
 
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cyberweed

Active Member
sounds right , im dooing this low key so roomate wont see susp. can i do a 3x2 and have a bunch of computer fans or 3x3
 
AeroKing

AeroKing

Well-Known Member
Xare said:
You wanna shoot for 50 - 70 watts per square foot.
in a 2x2 /w a 600 you are at 163
Click to expand...
600 / 4 = 163?
What? Did I miss something?

There is nothing wrong with using Mass amounts of light, so long as you can handle the heat. With a 600 in 2x2, you are probably way past the point of diminishing returns, and thereby wasting a fair amount of energy.
 
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cyberweed

Active Member
WOw U guys are the shit , Thanks my peeps to tell u the truth on this project I rather go with clf or 150watt but need some cheap lights so anybody in LA with bargains on small grow lights or really want to start this but with 2x2x5.5 or 2x 3 im out of luck for that 600w its a challenge for the heat
 
Xare

Xare

Well-Known Member
AeroKing said:
600 / 4 = 163?
What? Did I miss something?

There is nothing wrong with using Mass amounts of light, so long as you can handle the heat. With a 600 in 2x2, you are probably way past the point of diminishing returns, and thereby wasting a fair amount of energy.
Click to expand...

I got those figures from a Grow Room Calculator.

And it says this:

Note while hid lamps may use say 600 watts, the total electricity used including the ballast depending on make is between 645 and 660 watts, we have used the average actual use in real life for the calculations.
 
AeroKing

AeroKing

Well-Known Member
Xare said:
I got those figures from a Grow Room Calculator.

And it says this:

Note while hid lamps may use say 600 watts, the total electricity used including the ballast depending on make is between 645 and 660 watts, we have used the average actual use in real life for the calculations.
Click to expand...
Interesting...
So, I take it thats why a digital ballast is claimed to save electricity? ie. actually using 600w?

Anway, I believe the 50w/sq ft rule is based on the rated watts: 3x2.5=400w, 3x4=600w... but, maybe I'm wrong.
 
GypsyBush

GypsyBush

Well-Known Member
I use a cooltubed 600 HPS in my homemade tent... 36"x20"x54"

Check my sig for pics...

Works beautiful with proper ventilation...
 
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