4000W grow lights worth purchasing?

Hi y’all.

wanted your opinions on buying4000 w leds. Would it be worth it? Or am I better off getting multiple cheaper ones? I want to use them on around 20-30 plants and already have existing lights that are 2000w.

thanks!
 

coreywebster

Well-Known Member
The title 4000w is a meaningless number which has no relation to the actual wattage of the light.

One light might be called 2000w and another 4000w, doesn't mean the 4000w light is more powerful , you need to look at the power consumption or draw to compare them.

Then look at your area you are lighting and work to 45-50w of power consumption to make sure your providing enough light.
 
The title 4000w is a meaningless number which has no relation to the actual wattage of the light.

One light might be called 2000w and another 4000w, doesn't mean the 4000w light is more powerful , you need to look at the power consumption or draw to compare them.

Then look at your area you are lighting and work to 45-50w of power consumption to make sure your providing enough light.
whoops! I had no idea, forgive my ignorance! what specs would i need to look at to properly understand how to make a comparison? Thanks!
 

Puff_Dragon

Well-Known Member
Personally, I prefer my LEDs in quantum boards (at 3000K).
I run two of these lights in a 1m2 tent (each board is dimmable, in flower I run at the maximum of 240Watts each light *480Watts in total*).
imo, they kick the ass of a 600Watt HPS and together are 'comparable' with a 1000Watt HPS.
Plus, having the two lights gives me a more 'even' light coverage (than with one light fitting).

Peace.
 
Personally, I prefer my LEDs in quantum boards (at 3000K).
I run two of these lights in a 1m2 tent (each board is dimmable, in flower I run at the maximum of 240Watts each light *480Watts in total*).
imo, they kick the ass of a 600Watt HPS and together are 'comparable' with a 1000Watt HPS.
Plus, having the two lights gives me a more 'even' light coverage (than with one light fitting).

Peace.
Where did you buy your lights? And what does the 3000 k mean? Sorry if those are dumb questions. I can’t seem to find a source that explains everything in one place
 

Puff_Dragon

Well-Known Member
Where did you buy your lights? And what does the 3000 k mean? Sorry if those are dumb questions. I can’t seem to find a source that explains everything in one place
Hey no probs. :)

*Where did you buy your lights?*
I bought my Quantum boards (aka 'QBs') from an eBay seller (here in the UK), he was an electrician who built the lights to spec (all top quality parts, like Samsung's LM301B top bin LEDs and Meanwell drivers). The lights worked out at £1 per watt (lights were £240 each - when I bought them from him). Both boards are 3000K and happily work in dry or wet conditions. If you are in the US, search for someone your end (it would be a better deal).
So thats 480 Watts of QB (max - the lights are dimmable) in a 1m2 tent (the tent is 2m in height). With 4 plants, I pass the 1gram per watt 'wall' :)
fyi, QBs are my favourite lights at the moment :)

*what does the 3000 k mean?*
'K' stands for Kelvin. The light colour is measured in temperature. Basically, the lower the temp the more 'red' the spectrum.
People will say the peak colours are: 2700K (more Red) for flower and 6400K (more Blue) for veg.
3000K is a nice 'middle ground' if you will. It will work fine in veg but works best in flower (I think of it as the 'mixed spectrum' light temperature).

Peace.
 

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GBAUTO

Well-Known Member
I have been reading about lights for the past two months and thought i got a grasp of the material, suddenly i feel clueless again! :oops:
Welcome, MLC
Lighting can be a confusing subject, especially if you're new to growing.
What it comes down to is determining how 'much' light you will need to flower the space you're working with.
You have already seen the need to be able to compare apples to apples with that '4000w' fixture.
A simple metric that will get you in the ballpark would be this:
HID(HPS,MH,CMH) and older tech led 'blurples'-50 actual watts used/ sq ft of canopy.
QB's,COBS, Light strips w/ current tech diodes-30 watts/ sq ft of canopy.
The difference in power densities are the result of improved efficiency when converting watts of electricity to photons of light.
 
Personally, I prefer my LEDs in quantum boards (at 3000K).
I run two of these lights in a 1m2 tent (each board is dimmable, in flower I run at the maximum of 240Watts each light *480Watts in total*).
imo, they kick the ass of a 600Watt HPS and together are 'comparable' with a 1000Watt HPS.
Plus, having the two lights gives me a more 'even' light coverage (than with one light fitting).

Peace.
Space wise I am using two lights in that space, but based on the new information I learned today will see how it stacks up, thanks! I will post below my setup.
 
How about giving us the size of the grow area you are working with. You’ll have to decide between DIY & Plug and play
Horticulture lighting group, timber’s led lights, Aussie high lights, cutter strips and a few others are great.
We can pretty much use this entire room but we need to first make sure we have control over the humidity, as it has risen rapidly with current plants we have. The plan is though is to basically put more 3 gallon and 5 gallon pots under that row. There are a few now who will soon be transplanted from solos too.
 

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Hey no probs. :)

*Where did you buy your lights?*
I bought my Quantum boards (aka 'QBs') from an eBay seller (here in the UK), he was an electrician who built the lights to spec (all top quality parts, like Samsung's LM301B top bin LEDs and Meanwell drivers). The lights worked out at £1 per watt (lights were £240 each - when I bought them from him). Both boards are 3000K and happily work in dry or wet conditions. If you are in the US, search for someone your end (it would be a better deal).
So thats 480 Watts of QB (max - the lights are dimmable) in a 1m2 tent (the tent is 2m in height). With 4 plants, I pass the 1gram per watt 'wall' :)
fyi, QBs are my favourite lights at the moment :)

*what does the 3000 k mean?*
'K' stands for Kelvin. The light colour is measured in temperature. Basically, the lower the temp the more 'red' the spectrum.
People will say the peak colours are: 2700K (more Red) for flower and 6400K (more Blue) for veg.
3000K is a nice 'middle ground' if you will. It will work fine in veg but works best in flower (I think of it as the 'mixed spectrum' light temperature).

Peace.
That forest looks beautiful sir! Thank you for breaking it down, I am actually now closer to the UK than the States, so shipping wise I can order from both at reasonable rates. Will be researching more based on the info you shared.
 
Welcome, MLC
Lighting can be a confusing subject, especially if you're new to growing.
What it comes down to is determining how 'much' light you will need to flower the space you're working with.
You have already seen the need to be able to compare apples to apples with that '4000w' fixture.
A simple metric that will get you in the ballpark would be this:
HID(HPS,MH,CMH) and older tech led 'blurples'-50 actual watts used/ sq ft of canopy.
QB's,COBS, Light strips w/ current tech diodes-30 watts/ sq ft of canopy.
The difference in power densities are the result of improved efficiency when converting watts of electricity to photons of light.
You’d be surprised how many “grow books” i had tried reading on this subject but none of them touched on this stuff and seemed very superficial and mainly talking about comparing the different types and their pros and cons. This was very helpful, thanks!
 
We can pretty much use this entire room but we need to first make sure we have control over the humidity, as it has risen rapidly with current plants we have. The plan is though is to basically put more 3 gallon and 5 gallon pots under that row. There are a few now who will soon be transplanted from solos too.
Is this photo appearing clearly? For some reason it only half appeared when I clicked the original one I posted. Please feel free to also critique and give me advice on the setup, this our first attempt on doing this on our own so I am hoping to learn from the more experienced! Thanks everyone!
 

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X6xsilverx6X

Well-Known Member
So that doesn’t really help any of us, but you are looking at 30-40 watts of high quality led lighting per sq ft. That is not led from amazon or 98% of the terrible Chinese leds. If the room is 5x5 then you need enough light for 25 sq ft
 
So that doesn’t really help any of us, but you are looking at 30-40 watts of high quality led lighting per sq ft. That is not led from amazon or 98% of the terrible Chinese leds. If the room is 5x5 then you need enough light for 25 sq ft
Currently the main lights I’m using are these:


Still unsure of the chinese vs US stuff, and will be doing more research based on this thread info to make more sense out of what I currently have vs what I need. I had been thinking of getting the Spider farmer lights because i saw a lot of great reviews on them and they looked relatively light size wise, perfect for my frame.
Thanks for the info!
 

Homie Da Clown

Well-Known Member
Currently the main lights I’m using are these:


Still unsure of the chinese vs US stuff, and will be doing more research based on this thread info to make more sense out of what I currently have vs what I need. I had been thinking of getting the Spider farmer lights because i saw a lot of great reviews on them and they looked relatively light size wise, perfect for my frame.
Thanks for the info!
How is this?
we need $500 for a 4x4 space. Min.
480 watt qb, to 600 watt qb
Then you need all the environmental controls.
So for a room we need a few thousand dollars.
will this be cash or credit card?
 
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