Hlg 550 vs LED strip light 480 w

Major Blazer

Major Blazer

Well-Known Member
Mohamed. said:
Well I'm not a lighting expert but I kinda understand the difference between PAR and PPF. Let me try to be technically correct as much as I can. When I say that the PPF should be weighted against the plant's spectral response, I technically meant that the PPF of incident light on a plant should be weighted against the PAR action spectrum.
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This already doesn't make sense because PPF isn't a measure of incident light on an object, it is a measure of total output.

Mohamed. said:
And in this sense I say yes, HLG is wasteful compared to other standard grow light sources. Of course there is the issue of good penetration of green light but for example one growing lettuce doesn't need that good of a light penetration. I might be wrong in all of the above though :D but that's my understanding.
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Dr. Bruce Bugbee can do a better job than me at explaining synergistic effects of a complete lighting spectrum if you care to delve into the subject. And I honestly don't know what lettuce likes, I don't grow lettuce. :) Gl
 
bk78

bk78

Well-Known Member
Mohamed. said:
Well whatever the case maybe, I appreciate any reaction I get especially if it is that much entertaining to people :D :D cheers!

On the serious side though, if you know of an experiment or forum post where someone tried both types of light on clones from the same mother with identical feed and growing environment, I would be very much interested to read about that.
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Highly unlikely you’ll find a side by side since these were out of date years ago and most have moved on to quantum boards since.
 
bk78

bk78

Well-Known Member
Mohamed. said:
Well whatever the case maybe, I appreciate any reaction I get especially if it is that much entertaining to people :D :D cheers!

On the serious side though, if you know of an experiment or forum post where someone tried both types of light on clones from the same mother with identical feed and growing environment, I would be very much interested to read about that.
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Can you post up some of your grows you’ve done with the black dog? If you search quantum grows into here you’ll find hundreds to reference.
 
Mohamed.

Mohamed.

Member
Major Blazer said:
This already doesn't make sense because PPF isn't a measure of incident light on an object, it is a measure of total output.
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Okay, well, yes and no. PPF is the total output of a certain light fixture. Knowing the area on which this light hits, we can calculate the average PPFD for this light at a certain distance. Then if we know the area of the plant leaves exposed to this light, we multiply this leaves area by the previously obtained PPFD and we arrive at the PPF incident on the the plant leaves and not the total PPF from the light source. That's how it goes.

Major Blazer said:
Dr. Bruce Bugbee can do a better job than me at explaining synergistic effects of a complete lighting spectrum if you care to delve into the subject. And I honestly don't know what lettuce likes, I don't grow lettuce. :) Gl
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Thanks for the suggestion, but as I said in an earlier post, I watched almost all of his very informative videos. Information slip my mind though so it will be a good refresher if I watch them again.
 
Mohamed.

Mohamed.

Member
bk78 said:
Can you post up some of your grows you’ve done with the black dog? If you search quantum grows into here you’ll find hundreds to reference.
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Oh God, I wouldn't buy this BlackDog Light in a million years! What I have are cheaper LED lights that have a a similar spectrum as BlackDog's although mine are lacking in two area: they don't have much blue light as BlackDogs and they also lack a little in the green spectrum but still they work amazingly well!

I color corrected the camera before I took this photo, but to the human eye the light actually looks blue-red. So as I said, these cheaper LEDs work very fine for me.

G (25).JPG
 
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Mohamed.

Mohamed.

Member
.Smoke said:
...(screws in new hps bulb)..
...(grabs bag of popcorn)...

Continue please... :lol:
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Oh get off your high horse :D:D

A few months ago I set up two growing tents for a friend of mine who doesn't know anything about growing, one for veg and one for flower. I went with the old and trusted MH and HPS, effective and cheap. So I'm not like an LED fanatic by any means. I just go with whatever works. That said, I'm having a stretching issue in his flowering tent so we are going to install a small MH light along with the HPS, is this a viable solution to stop stretching under HPS? I didn't have this issue with stretching with my LEDs though.

Edit: I should mentioned that's he's growing pure sativas though, but still the stretching is just insane.

Edit again: feed is maxibloom and MOAB at the moment so very little nitrogen.
 
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bk78

bk78

Well-Known Member
Mohamed. said:
Oh God, I wouldn't buy this BlackDog Light in a million years! What I have are cheaper LED lights that have a a similar spectrum as BlackDog's although mine are lacking in two area: they don't have much blue light as BlackDogs and they also lack a little in the green spectrum but still they work amazingly well!

I color corrected the camera before I took this photo, but to the human eye the light actually looks blue-red. So as I said, these cheaper LEDs work very fine for me.

View attachment 4550941
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Anything can veg a plant. Flower is where it counts
 
T macc

T macc

Well-Known Member
Mohamed. said:
Oh get off your high horse :D:D

A few months ago I set up two growing tents for a friend of mine who doesn't know anything about growing, one for veg and one for flower. I went with the old and trusted MH and HPS, effective and cheap. So I'm not like an LED fanatic by any means. I just go with whatever works. That said, I'm having a stretching issue in his flowering tent so we are going to install a small MH light along with the HPS, is this a viable solution to stop stretching under HPS? I didn't have this issue with stretching with my LEDs though.

Edit: I should mentioned that's he's growing pure sativas though, but still the stretching is just insane.

Edit again: feed is maxibloom and MOAB at the moment so very little nitrogen.
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How far is the light? Pure sativas will stretch insanely no matter what you do. You can top them to bush them out. What strain?
 
.Smoke

.Smoke

Well-Known Member
Mohamed. said:
Oh get off your high horse :D:D

A few months ago I set up two growing tents for a friend of mine who doesn't know anything about growing, one for veg and one for flower. I went with the old and trusted MH and HPS, effective and cheap. So I'm not like an LED fanatic by any means. I just go with whatever works. That said, I'm having a stretching issue in his flowering tent so we are going to install a small MH light along with the HPS, is this a viable solution to stop stretching under HPS? I didn't have this issue with stretching with my LEDs though.

Edit: I should mentioned that's he's growing pure sativas though, but still the stretching is just insane.

Edit again: feed is maxibloom and MOAB at the moment so very little nitrogen.
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If you want to stop stretch, defoliate. A lot. At flip. Like this.
20200119_011320.jpg
It will redirect energy into leaf production and stop vertical growth. Giving a short, squat plant.
20200302_013519.jpg
20200302_015210.jpg
That was a photo Skywalker OG that hit only about 24"
..edit...produced over 8oz
 
Mohamed.

Mohamed.

Member
T macc said:
How far is the light? Pure sativas will stretch insanely no matter what you do. You can top them to bush them out. What strain?
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The light was initially about 30" because it runs so damn hot but now those plants just shoot through and are about to touch the top of the tent, very sad to see. I'm not able to do anything because I visit my friend like once a month and he's kinda clueless about this stuff.

They are bagseed actually, I now think it's a mistake that we just went with those instead of finding a good strain. I swear they more than tripled in height!
 
Mohamed.

Mohamed.

Member
T macc

T macc

Well-Known Member
Mohamed. said:
The light was initially about 30" because it runs so damn hot but now those plants just shoot through and are about to touch the top of the tent, very sad to see. I'm not able to do anything because I visit my friend like once a month and he's kinda clueless about this stuff.

They are bagseed actually, I now think it's a mistake that we just went with those instead of finding a good strain. I swear they more than tripled in height!
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Tell him to look up super cropping. .Smoke had a good idea about defoliating before flower. Make sure he has enough root space, and flip soon, sounds like a long wait for flower
 
Mohamed.

Mohamed.

Member
T macc said:
Tell him to look up super cropping. .Smoke had a good idea about defoliating before flower. Make sure he has enough root space, and flip soon, sounds like a long wait for flower
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Thanks for this super-cropping idea. I read about it in the past but never used it. I will give it a try.
 
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