600w vs. 400w HPS

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lJusticel

Active Member

• Oct 12, 2010

• #1

Hey all. I'm fairly new to growing and i plan on starting a grow once I feel confident I've learned enough. I would like to know the ideal coverage area (sq.ft.) of a single 400w vs. a single 600w HPS. Thanks in advance for your replies.

 

420God

Well-Known Member

• Oct 12, 2010

• #2

3x3' for a 400w
4x4' for a 600w

 

rasputin71

Well-Known Member

• Oct 12, 2010

• #3

Great timing on this thread. I couldnt decide which size to get for my 34" x 40" flower room. It looks like 400w will be OK, and will help so I dont overload my circuit it is sharing with the veg room.

 

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lJusticel

Active Member

• Oct 12, 2010

• #4

Thanks 420God. Just the answer I was looking for. looks like I'll be going 600.

 

420God

Well-Known Member

• Oct 12, 2010

• #5

You can go as big as you want as long as you can keep the temp down. I've seen people grow 2 plants under a 1000w in a cool tube. I personally have a 400w air cooled hood in a 3x3' tent.

 

420God

Well-Known Member

• Oct 12, 2010

• #6

lJusticel said:

Thanks 420God. Just the answer I was looking for. looks like I'll be going 600.

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No problem, anytime.

 

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pimpin paulie

Member

• Oct 12, 2010

• #7

i veg six in my veg room under 400w.and flower room is six under 1000w

 

420God

Well-Known Member

• Oct 12, 2010

• #8

pimpin paulie said:

i veg six in my veg room under 400w.and flower room is six under 1000w

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How's that 1000w offset your electric bill? Just wondering incase I upgrade.

 

oregon024

Active Member

• Oct 12, 2010

• #9

My flower rm is 5ft 6in square 2000 watts do it.Good ventalation and don't piss off the electric company

 

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lJusticel

Active Member

• Oct 12, 2010

• #10

How about if I stagger my grow. Like flower 2 plants for a month before I put 2 more plants in. would the taller plants affect the light coverage on the smaller ones as there is only one bulb? I would like to harvest smaller amounts more often.

 

420God

Well-Known Member

• Oct 12, 2010

• #11

Have to keep the veg and flower seperate. 18+ hrs for veg and 12/12 for flower and the light height has to be even or the plants will reach and stretch for the light.

 

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lJusticel

Active Member

• Oct 12, 2010

• #12

Thanks for the info I've been lurking for quite a while now just reading everything I can. I already plan on vegging under a 400w MH in a seperate area. I suppose I could move the new plants higher to equal the height of the old plants.

420God said:

Have to keep the veg and flower seperate. 18+ hrs for veg and 12/12 for flower and the light height has to be even or the plants will reach and stretch for the light.

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