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How much light is needed when going vert?

boodha

Member
Will a 400 watt cover a 4x6 room? Just wondering how much space can be covered. We're talking cubic feet now?
 

boodha

Member
If you had a 4x6 room with 6 foot high ceiling, would stadium or circular grow yield more? This will be with a 400 watter.
 

boodha

Member
Well 2 600s seems like an over kill but yea more light is better. 2 400s or 1 600 sounds more like it? What area can I cover with a 400?
 

bobblehead

Active member
Veteran
4x4x4 as agent smith suggested. Stack 2 or 3 400w lamps on top of each other and that's even better! :)
 

Marlo

Seedsweeper
ICMag Donor
Veteran
I think 4x4 is a bit generous.
I've never used a 400 in a space bigger than 30 inches wide, and still end up with some airy buds. The larger the space, the lower your watts/sq ft, which will give you more lower quality airy buds. That space could easily take 2 6oo's. 1 400w will work, but expect more than half of your harvest to be airy see-thru buds if you fill that entire 4x6 space with plants.

Good luck


This was a single 4oow in a DR80. (2.5 x 2.5 x 5)

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D

DHF

The first time I saw Heath Robinson`s vertical rack setup , it was in a 4 x 6 area with 2-600 watt bare bulbs hangin with 3 levels of plants on all walls except the lil door he had for entry.....

He ran buncha self made fem`d seeds straight 12/12 and filled in the canopy gaps with fully rooted cuts , and did lil over 4 lbs with I think 87 plants........

It was a fast way ta find the proper pheno`s for his breeding and blew the fuck up without him knowin it , and the rest was history.....

I immediately converted 8 ebb and flow bucket flip rooms over to the racks and never looked back till shutdown.....

50 watts per sq ft guys......Dial the environment as well as the strains and the rest will take care of itself........

Peace..DHF....:ying:.....
 

Agent-Smith

Member
50 Watts/sqft is not a tried and true rule. I run 30 watts/sqft with great results and increasing it probably wouldn't help me enough to be worth it.
 
D

DHF

Ran 34 watts per sq ft for over 8 yrs with dialed results or so I THOUGHT AS......

How would you know without ever doin so.....Saying it`s not tried and true without doin it`s kinda lame in my book.....

Once I moved up to 50 watts per , the difference in quality , density and flavor was different as daylight and dark with the same exact strain I`d run for over a decade......

Yields also increased.......bar none....

It`s tried and true I assure yas or all my Grow Bro`s that do this for a living wouldn`t have followed suit and done so for many many yrs........

You can grow dope with a 150 watt HPS bulb , but dialed setups take more......along with the understanding of why everything works .......

Just tryinta help AS , not argue semantics or apples and oranges.......

My 2 cents from all those yrs of dialin shit....

Peace....DHF....:ying:.....
 

Agent-Smith

Member
For sure, it can work, it just depends on your setup. You can overcome other deficiencies with more light and get better results, but it doesn't mean it's worth the added costs. My setups maximize the efficiency of everything so that I can use less light for the same results as most other people. Increasing the light will increase my yields I'm sure, but is it worth the added cost and heat, etc.? I wasn't arguing the fact that it could increase the yield, I was argueing the fact that 50 watts/sqft is something you "have" to run to get a good yield. I beat most people's numbers with 30 watts/sqft while they run 50+ watts/sqft. :D
 

spadedNfaded

Active member
Veteran
I will have to agree with Marlo on this one.

I use a 3x3x7 space with a barebulb 400 in the middle. I get decent density and most of the plants are within 10 inches of the bulb.

I can fit 4 3.5gal dros, or 6/7 3 gallon soils comfortably. After that you sacrifice coverage and yield.

- SubN
 
D

DHF

Ok.....As I said above , I`m not tryinta argue your dialed efforts with 30 watts per sq ft since I pumped out 10 lb rooms for almost a decade with only 4 plants and 34 watts per , but.......

You talkin bout outyielding folks setups that run 50 watts per sq ft only shows that they don`t have their shit dialed , or I assure yas you wouldn`t be singin the same tune.....guaranteed.....

50 watts per sq ft with dialed environment and strains.....No room for compromise once setup`s are all they can be.....

For the record......the difference between 30 and 50 watts per sq ft environment wise , doesn`t require THAT much more equipment to deal with increased heat and air exchange , so please don`t talk about added expense when it`s minimal at best for dialed results once everything falls into place......

Glad you`re doin well with 30 per dewd....Till you TRY and dial your setup with 50 per , you`ll never know how good it can get , so don`t pass on your "opinion" , but rather your "results" after having tried/done it with dialed conditions......

Peace..DHF...:ying:....
 

bobblehead

Active member
Veteran
For sure, it can work, it just depends on your setup. You can overcome other deficiencies with more light and get better results, but it doesn't mean it's worth the added costs. My setups maximize the efficiency of everything so that I can use less light for the same results as most other people. Increasing the light will increase my yields I'm sure, but is it worth the added cost and heat, etc.? I wasn't arguing the fact that it could increase the yield, I was argueing the fact that 50 watts/sqft is something you "have" to run to get a good yield. I beat most people's numbers with 30 watts/sqft while they run 50+ watts/sqft. :D

yield is only part of the goal... I'll take the same oz at 50wpsqf>30.
 

zor

Active member
at which point would u all think the point of diminishing returns is. is 75 watts per foot proportionately better than 50 watts provided the environment is the same?
 
D

DHF

Diminishing returns are hard ta come by or evaluate if environment`s dialed Zor.....

I`ve got Bro`s that use 100 watts per sq ft on E and F flood tables and swear by it with Kush strains , but there`s really no way ta judge whether or not things would do just as well with dialed conditions and half that wattage without doin everything the same with the same strain and same environment side by side.......

Environment over wattage has always been my trade secret , but 50 per minimum really upped my game once dialed in......

Peace......DHF....:ying:...
 

Agent-Smith

Member
You're talking like you know that I haven't tried it. I never said I haven't tried it. But I also don't run normal hoods like most people either. I make custom hoods to maximize my light coverage and my yields show that. I average 1.25-1.5 GPW and have gotten more than that before. I use 600W bulbs vs. 1000W and I find that they are more efficient than 1000's but it doesn't mean I won't get more yield with a 1000 over the same area. I would rather not though since I usually run more than 1 light at a time and I can get the lights closer for better production. Plus when you start adding that many lights, the additional cost for HVAC and electricity isn't worth it to me. If you're doing things right, you don't "need" 50 watts/sqft but I wasn't arguing it can increase your yields by doing it.
 

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