First off, the spectrum graphs they show are utter BS- and why are there two, different spectrum graphs on the first page? The first spectrum graph is NOT from any LED-based light, the spikey nature of the spectrum graph shows that; the 2nd graph is from an LED but has been manipulated to look like it has UV. If you click “find out more” under “The Full Spectrum” there’s actually a 3rd, different spectrum graph that they claim is theirs that shows they DO NOT have UV, like they claim so many times… They brag about having UV, but when you click “find out more” they admit “This particular High Light also has a small amount of UVA and near-UV” which is NOT from UV diodes but accidental, inconsequential amounts of UV let off by every blue (and white) LED in existence. They’re doing the same slimy manipulation that so many companies do. If they had any consequential amount of UV, they wouldn’t be able to get above 3.0 umol/J (which, just like Fohse, they probably are lying about anyhow). So yeah, I'd say you certainly didn't copy Black Dog lol
You're an idiot. I helped design those lights – along with LED Teknik – so I know what I'm talking about. Ever heard of narrow band phosphor?
No, I didn't think so. Here's our custom 3000K three-die narrow band phosphor 3030 package.
Here's Nichia's, which is a single die and less efficient.
As you clearly know nothing about LED technology, here is s link for you:
https://www.led-professional.com/all/advanced-phosphor-technology-boosts-cri-and-efficacy
As for the graphs – I assume you are talking about the home page of
www.growlightsaustralia.com – then there is a very simple explanation: the first graph is the result of a goniometer test that is one of the most accurate light measuring devices on the market (and costs something like US$50,000 per unit).
The second graph is a spectrograph from a common Lighting Passport hand-held spectrometer (mine, actually). If you are confused, it's because you have no experience with any of this type of equipment and, as I have already stated, know very little about LED technology. Certainly not enough to start criticising companies that put more time and research into these things than you spend time on these forums.
The third graph you reference is the old (original) High Light spectrum – not the High Light 420 spectrum. You don't even know the difference, do you? And you think you're qualified to comment on what LED spectrographs are supposed to look like? Give me a fucking break!
EE BRUCE LEROY said:
“This particular High Light also has a small amount of UVA and near-UV” which is NOT from UV diodes but accidental, inconsequential amounts of UV let off by every blue (and white) LED in existence.
Aboslute bullshit. The near-UV and UVA come from a customised 3030 LED that is also a three-die chip with 2x 405nm dies and 1x 420nm die with a blue phosphor coating. Here it is on its own. The "blue (and white) LED in existence" chips you are referring to all use 450nm pumps. I'm sure you knew that. Not.
Now, if you were mathematically inclined – which I doubt – you would actually be able to calculate on paper (just like I did) the basic efficacy of our LED panel by multiplying the electrical efficiency by the quantum efficiency of radiation (QER) of each diode, and then calculating how many umol/j each diode emits as a proportion of the total number.
The final prodction PC Blues above are about 1.7 umol/j. However, they are offset by the fact we also have 660 monos (3.94 umol/j), 730 monos (3.64 umol/j), Nichia 757 series 5000K CRI70 (3.13 umol/j) and Nichia 757 3000K CRI80 (2.75 umol/j) and custom 3000K narrow band phosphors (2.77 umol/j as you can see above). All those efficacy levels are at certain currents, so you also need to know what current you plan to run to calculate the total figure. We make no secret that we hit 3.01 umol/j at 86.5W – which is clearly shown on the home page.
But I can also tell you that due to the fact we use so many 3-die chips – and we are one of the few (if not the only) companies doing this, our boards also have better efficiencies at higher currents: 2.69 umol/j at 5A (234.5W) – find me another LED panel with UVA, near-UV and almost 10% Far Red that is that efficienct at that wattage. Hint: you won't fine one!
And if you don't believe our figures, well I for one DGAF, but if you show me your testing equipment, I will ask GLA to send you a board to test for yourself. You do work for Black Dog, right? Or do you have some other agenda? Because you certainly don't have any experience with our products and I doubt any of us (GLA, LT, myself) have had any interactions with you.
With apologies to Black Dog, because I don't think they would have anyone as ignrorant as you working for them.
And apologies to everyone else. We've always been upfront about our claims and welcome anyone (who knows what they're doing) to test them.