HLG vs HGL Side By Side Take 2

Who do you think will win?

  • HLG

    Votes: 63 85.1%

  • HGL

    Votes: 11 14.9%
  • Total voters
    74
  • Poll closed .
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hybridway2

hybridway2

Amare Shill
Stephenj37826 said:
You can actually generate more green with white per watt than monos pretty much and get all the other light for free.....Cost wise at least. Especially 70cri.....
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If that's your desired goal. For HGL, they seek specific ratios of specific nanometers. Targeted spectrum approach.
They once had white in their G1 & G2 spectrums & decided to eliminate them based on results is what I'm told by hgl.
 
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Randomblame

Randomblame

Well-Known Member
hybridway2 said:
Yes indeed, 2 , 740's in each cluster. View attachment 4335695
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Blue diodes are much more efficient like the green ones(green is actually the worst of all) so it's more like a 1:1 ratio. I also miss the 700-750nm range in their spectrum SPD. These 8 far-reds per fixture should at least cause a little spike in this area.
The german SanLights (Osram) have a spectrum that looks pretty close but they use 2 different white diodes + added red and deep red to create it so that the light looks almost white with just a slightly pinkish tint.

I'm pretty sure these lights will grow some nice bud they just need more energy like the Trinity. Considering the lower distance and slightly focussed light I would say at least a third more.

BTW, slightly smaller leaves are also an effect of more blue light! The chlorophyll is simply packed denser under more blue... So also if the leases look smaller they have almost the same amount of chlorophyll. They should also feel slightly thicker because of higher chlorophyll density.
I've used additional 420-430nm and 650-660nm on my old 3500°k COB veg light before I've changed to strips and also found slightly smaller but darker leaves. All parts of the plant are affected not only internode length and plant stature.
I think the 10 : 15 : 75% are what's used energy wise, measured with a spectrometer it should be a little more blue and slightly less green and red but without such a device its just guess work.

The thing is, 450$ per light is outrageous!
These type of LED cluster lamps you can get really cheap(less than 100$) and they exsist since a long time. They have only told their OEM manufacturer to add more green diodes and leave the white ones away. That's not worth addidional 350$. Also a few test runs add no more costs to these lights. The opposite, they can sell the outcome to pay for the used energy and such things.

I've nothing against them except the price. I hope they follow this test grow and read the whole thread. Its meant as constructive critique same as my other postings about them.

For 450$ you can get a comparable Unitfarm fixture using Cree and other top brand diodes. Not the same spectrum and ratios but much better efficiency and also a better cooling system. For 450$ you can also get a passively cooled Sanlight S4W bar (140w, all Osram) which has 2,7μMol/j at system level an ~2,0μMol/j @canopy level. (Migro owner has tested them).
 
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Stephenj37826

Stephenj37826

Well-Known Member
Specktrum said:
Seriously, Lumen and mW data? Let's see your micromole Data Stephen. You claimed your white LEDs produce more green than a targeted green LED. You still have FAILED to provide any evidence that supports your claim.
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Start here grasshopper

https://www.rollitup.org/t/math-behind.868988/

The QER of this particular mono green is just guessing 4.3 umols ish. I don't have the time to digitize the spectrum and get exact numbers but it's close enough to realize that the best mono greens are well south of 1.5 umol/j......
 
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