What size light for a 2 by 2 by 4 grow tent

HydroRed · Jan 28, 2020

(2) of these in a 2x4x5 would do very well if you can assemble very simple, basic diy stuff.

135W QB V1 LED Kit

Ultra High Efficiency LED Boards for DIY. QB288 has 288pcs Samsung 561C for 5000K or Lumileds 2835HE for 3000K

horticulturelightinggroup.com

PhatNuggz · Jan 28, 2020

Anyone who knows anything about LEDs for cannabis knows philiz, among all similar chinese junk leds is CRAP

I use an Amare Technology 260 or P 300 in my 2 x 4 tent. The P-300 is better in that the 3 modules are horizontal, which spreads the light much better (ideal for a 2 x 4) than the 260 (ideal for a square tent), which has 4 modules in a square (see pic). The P 300 is in the open tent picture. The ring surrounding the COBs consists of 450/660 and IR. They are on a separate o/o switch, which can be used alone for veg

There is a small plant behind the 40" plant you see. Also 3 clones from the 'big' plant on the right side. IMO, 2 of the 'big' plant max in this tent

Tip, I raised the bottom of the tent with bricks to increase the hight. Also, I put the tent skin on upside down, which puts multiple exhaust up high since hot air rises. Also, the P 300 is only ~ 8" wide, which allows hot air to rise far easier than a typical rectangular light. Oh, and I leave the front flaps open 24/7. I only zip them up when someone comes over who isn't cool

If you want an inexpensive LED, check out Spider Farmer, a true full spectrum light, including IR!

hth

whitebb2727 · Jan 28, 2020

Hatchet72 said:
Amazon vivisun lights 1200w cree cob led

Those look to be a mix of cobs and cheap leds.

What you have will work. Just know its not the most effecient light. Ive grown with about every type of light. Ive seen all the arguments about effwcincy and different parameters of different lights. Some of that plays a role but it more or less comes down to the grower. If you are a shit grower it doesnt matter the light.

The main thing is to remember that cannabis is not special. It doesnt need all those cannabis specific nutes. Keep it simple. Use a simple balanced feed. Control environment. Keep the plant happy and all else falls in place.

coreywebster · Jan 28, 2020

Hatchet72 said:
Look it up again it says 176 watt actual power plus or minus 3% I only got it because of the good reviews

One i'm looking at says 220w

Phlizon 900W LED Plant Grow Light,with Thermometer Humidity Monitor,with Adjustable Rope,Full Spectrum Double Switch Plant Light for Indoor Plants Veg and Flower- 900W(10W Leds 90Pcs): Amazon.co.uk: Garden & Outdoors

Great prices on your favourite Gardening brands, and free delivery on eligible orders.

www.amazon.co.uk

That's more than enough for clones and early veg in a 2x2ft space. I would only use the veg switch if your rooting clones, flip both switches after they are rooted.

I wouldn't take much notice of reviews for lights on amazon, most people plug it in, it lights up and they leave a review, sometimes people wait a month into veg, at which point it seems great because plants don't need much to veg with.

There's a thread specifically for that brand in the LED section with a couple of guys showing the results. Check that out.
Not a fan of that light but in comparison to the other average shit LEDs they do seem to represent a bit better value for the money.

Look at spiderfarmer LEDs for the 2x4 if your on a budget. Or pick up a 260 v1 kit from hlg which are pretty fairly priced and excellent lights.

BluntMoniker · Jan 28, 2020

Didnt read what anyone else said...

But I have a 2x3x5 tent and currently run a 150w HPS with 2x 2ft t5s to supplement. Heat buildup is an issue though, as well as light footprint in my space, so I've been looking at moving to LEDs.

Lights on temp is high 80s (Fahrenheit), and high 70s lights off. And that's with ventilation sucking hot air directly off the 150w, plus fans for circulation, and an ambient temp in my house of 66-74.

Take that for what it is, but I'd suggest LEDs in that sized space as opposed to HID lighting

Jonboy34 · Jan 28, 2020

In my 2x4 tent I run a quantum board Samsung 301b 3000k with red leds down the middle 240 watt. And run a Vivosun 600 watt but actual watts 220. This is my first grow 3 weeks into flower and lights are doing good.

Hatchet72 · Jan 28, 2020

this is the specs on my philizon 900 watt real watts are 176 w w/+ or - 3%

Jonboy34 · Jan 28, 2020

Hatchet72 said:
View attachment 4466499 View attachment 4466502this is the specs on my philizon 900 watt real watts are 176 w w/+ or - 3%

That seems to be good for one plant. I only have 2 plants in my tent. Try to train them to bush out.

coreywebster · Jan 28, 2020

Hatchet72 said:
View attachment 4466499 View attachment 4466502this is the specs on my philizon 900 watt real watts are 176 w w/+ or - 3%

It says right below the red star 220w.
Where does it say 176w?

Couch_Lock · Jan 28, 2020

In a 2 x 2 x 4 veg tent virtually any light source is ok, lol. Blue spectrum is best.

Hatchet72 · Jan 28, 2020

coreywebster said:
It says right below the red star 220w.
Where does it say 176w?

That's what the description on Amazon said when I looked it up take me awhile to find this paper

coreywebster · Jan 28, 2020

Hatchet72 said:
That's what the description on Amazon said when I looked it up take me awhile to find this paper

Could be the voltage difference between our two countries then. Im on 230v and everything I look at on amazon is for my location.

Couch_Lock · Jan 28, 2020

amazon.uk is a lot different then amazon in the usa, yeah.

Hatchet72 · Jan 28, 2020

coreywebster said:
Could be the voltage difference between our two countries then. Im on 230v and everything I look at on amazon is for my location.

240 here now i need to find out if i need 2 lights in my 2×4×5 tent for 2 plants. My 2×2×4 tent is only for clones and veg if not at harvest. If i don't need 2 lights in big then im going with 3 to 4 t5 lights?

coreywebster · Jan 28, 2020

Hatchet72 said:
240 here now i need to find out if i need 2 lights in my 2×4×5 tent for 2 plants. My 2×2×4 tent is only for clones and veg if not at harvest. If i don't need 2 lights in big then im going with 3 to 4 t5 lights?

Well as far as that light goes, for flowering in 2x4 if that's the idea, two of them would work. Or use the one you have and pick up a single QB 135w kit for one half and use that on the other.
You could run something a lot less for clones and veg than that light. You could go for hlg65 or hlg100 or equal light from another company doing similar things. You could literally get a few screw in household leds in the 2x2.
Personally I don't use t5 or t8 but they are very good for clones and veg. If you have them then use them.

Couch_Lock · Jan 28, 2020

coreywebster said:
hlg100

Picking up one of these would be a smart move, Hatchet. https://www.amazon.com/Horticulture-Lighting-Group-High-Efficiency-Upgraded/dp/B07C59J8L2

a quality light, suitable for veg or flower and adequate for your needs.

Hatchet72 · Jan 28, 2020

coreywebster said:
Well as far as that light goes, for flowering in 2x4 if that's the idea, two of them would work. Or use the one you have and pick up a single QB 135w kit for one half and use that on the other.
You could run something a lot less for clones and veg than that light. You could go for hlg65 or hlg100 or equal light from another company doing similar things. You could literally get a few screw in household leds in the 2x2.
Personally I don't use t5 or t8 but they are very good for clones and veg. If you have them then use them.

Have one t5 thats y i ask about lights for the 2×4 just didn't know how many

christopher jordan · Jan 28, 2020

Couch_Lock said:
In a 2 x 2 x 4 veg tent virtually any light source is ok, lol. Blue spectrum is best.

Actually 3000k is best for veg and or flower.

Couch_Lock · Jan 28, 2020

christopher jordan said:
Actually 3000k is best for veg and or flower.

Actually you are wrong. 3500k is best for both.

https://imgur.com/AGR48FO

3500k is the best spectrum for seed to harvest, the Rspec in particular has added blue + far red........have a Timber 3000k 90 cri, its not all purpose, its just a supplemental flower light to me

Hatchet72 · Jan 28, 2020

Jonboy34 said:
That seems to be good for one plant. I only have 2 plants in my tent. Try to train them to bush out.

I'm going srcog

What size light for a 2 by 2 by 4 grow tent

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