greenman28
Active Member
400W HPS = 50,000 lumens
4 sq ft grow tent = 12,500 lumens per square foot.
Will this be okay if I keep my temps cool?
4 sq ft grow tent = 12,500 lumens per square foot.
Will this be okay if I keep my temps cool?
Can I use a 400W HPS in a 2'x2' grow tent?
- Thread starter greenman28
- Start date
just8420
Active Member
IDK but i would think that would be asking for a fire!
im in a 3x8' space (24sq ft) and my 400w gets pretty hot
also i dont think that you would have any room to grow in. if you have a pot thats a foot 6'' tall you only 18'' to work with.
also a 400w hps is 50,000 lumens @ 1 foot away
i think it would be like a oven!
i'm sorry. just get a little more height and if you can control the temps it could work.
im in a 3x8' space (24sq ft) and my 400w gets pretty hot
also i dont think that you would have any room to grow in. if you have a pot thats a foot 6'' tall you only 18'' to work with.
also a 400w hps is 50,000 lumens @ 1 foot away
i think it would be like a oven!
i'm sorry. just get a little more height and if you can control the temps it could work.
BudsMckenzie
Member
depends on the real dimension of your grow space, your LxWxH. You're growing in a 3-D space, not a 2-D square. JUST is correct in assuming you have a limited growing space, 400w HPS will be to much. If you run a cool tube a 150w or even a 250w would be more than adequate for a plant or two in that space.
cowboylogic
Well-Known Member
Its done all of the time. And the 50,000 lumens is right at the bulb. At 1 foot its already down to under 16,000. Heres a chart.View attachment 963522
cowboylogic
Well-Known Member
He said grow tent guys. Most tents are at least 68 inches high.
Humboldt14
Well-Known Member
yea if you are in a grow tent as long as you have a cooltube air cooled hood and good ventalation you can def. use a 400 in your tent
racerboy71
bud bootlegger
i was looking into getting a four hundred to replace my now 250, and the guy at my local hydro store told me that it would be overkill unless i had a 3'x3' area.. anything less than that and he said that heat would really kill the benefits of the added lumens..
Dezracer
Well-Known Member
Are you asking about a 2'long X 2'deep X 5'tall space?
GrowKid88
Well-Known Member
yes i am. i would use cfl for veg then use 400w for flowering.
im doing the same thing pretty much but mine is 5x2x5.... How many cfls are you using for veg?
GrowKid88
Well-Known Member
well i was thinking about starting off with two 42w and then just adding more as they get bigger. i did that before but i dont have that much room this time.
nz_planter
Active Member
good inline fan good exhaust fan co2 coming in and be fine I'm in a 2x2 my bad thought I was in 3x3 but I got 4 girls cramped into tent with good air flow and circulation air I'm getting good results so far but 3x3 would be better or even 4x4 and upgrade to 600w hps
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wil2279
Well-Known Member
Well I read the initial post and replied to it... Then I started reading back through the comments and I'm reading a lot of comments about how, and cfl's... And I'm thinking holy shit this sounds like a thread from 10 years ago... So I looked at the dates of all the comments and the original post and realized how old the thread really was