Room size and hps size

**Middy74** · 03-10-20, 02:21 PM

Hi all has some already know on here i moved house and had to start again. Novice i am .
Question is my new room is 3ft x 6ft x 7ft im a joiner so built it myself is my 600w hps still ok for this size room ?
A1 6 in rvk intake on vairac
L1 6 in rvk exhaust on variac

**Shreder** · 03-10-20, 02:41 PM

Originally Posted by Middy74

Hi all has some already know on here i moved house and had to start again. Novice i am .
Question is my new room is 3ft x 6ft x 7ft im a joiner so built it myself is my 600w hps still ok for this size room ?
A1 6 in rvk intake on vairac
L1 6 in rvk exhaust on variac

600 hps with a wide angle reflector could light up a 4*4. So rather get another 400w for perfect coverage. Jmo

Ongoing diary >>> OGKZ / Gelat.OG / GZ / LSD (Coco, 750w lm301b)

**Middy74** · 03-10-20, 02:53 PM

So is the 600w to big for this size room ?

**Shreder** · 03-10-20, 02:55 PM

No man, its too small. But if u place in tents center
You will only lack light on the last 1ft of each side. You will cover 4*3 perfectly.

Ongoing diary >>> OGKZ / Gelat.OG / GZ / LSD (Coco, 750w lm301b)

**Middy74** · 03-10-20, 03:00 PM

Right thanks for that shreder my plants are in the center so i should be ok .im growing 4 Afghan but im going to have chop one at least due to space

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at minute on cfl but on flipping move them centre and put on 600 hps ?

**Middy74** · 03-10-20, 03:07 PM

Right thanks for that shreder my plants are in the center so i should be ok .im growing 4 Afghan but im going to have chop one at least due to space

at minute on cfl but on flipping move them centre and put on 600 hps ?

**Farmer Geddon** · 03-10-20, 04:56 PM

A 600w hps will just about cover 4'x4' but not all strains do well at 37.5w psf of hps.

I'm not a fan of using weaker light for vegging. Whatever they get for flowering, that's what I give them all the way through.

In your situation, I would start them under a 600w hps at one end and when they outgrew that, spread them out and turn on a 2nd 600w hps. That would be 67w psf and your airflow should be good enough to handle that.

**Shreder** · 03-10-20, 05:12 PM

Originally Posted by Farmer Geddon

A 600w hps will just about cover 4'x4' but not all strains do well at 37.5w psf of hps.

I'm not a fan of using weaker light for vegging. Whatever they get for flowering, that's what I give them all the way through.

In your situation, I would start them under a 600w hps at one end and when they outgrew that, spread them out and turn on a 2nd 600w hps. That would be 67w psf and your airflow should be good enough to handle that.

+1
As ive ran a 1000w hps in a 4*4 last winter.

Ongoing diary >>> OGKZ / Gelat.OG / GZ / LSD (Coco, 750w lm301b)

**Middy74** · 05-10-20, 10:49 AM

How high should i put my hps when i flip my plants to avoid bleaching them.
Light now in veg 450w cfl
When flowering 600w hps
Or i do have a 800w cob led light ?