An HLG-550 is just 4 quantum boards. I think my point can be easily surmised…Are HLG-550s not quantum boards? Semantics…First difference between my tests and yours is that I didn’t use “cheapy” components, I gave HPS a fair shot. There are substantial differences between
low quality bulbs/reflectors, etc. and
high quality equipment. You can find data supporting this with a quick google search.
Second problem, a 16-point test. Why would you choose to test only 16 points? I’d be interested in seeing how you spread a mere 16 points across a 4’x4’ footprint. HLG at-least did a 33 point uniformity test. They wouldn’t want to showcase a 49 point test because that would likely produce an even lower value. A 16 point test isn’t even credible in my opinion. There’s 0 reason to conduct such a low-point test, aside from creating the illusion that the test subject is better than it really is.
I’m in full agreement with you in that QBs are more efficient than HPS. 50% less power draw, 30% less light output. Again, I’m not saying QBs are worthless garbage. My point is that the “1000w HID replacement with 50% less power draw” claim is nothing more than a marketing ploy, and its working (for now).
You cannot come to any valuable conclusions with your figures. “eyeballing” datasheets cannot trump
physically testing these technologies. A 16 point test over a 4’x4’ space is utterly worthless. Using “cheapy” equipment to test against is obviously flawed practice.
With regards to uniformity, I have worked it out. It’s a click away. It doesn’t matter what you
think is “blatantly obvious”. You have not conducted proper tests, and so you do not have credible data. I never stated HPS has better uniformity than HLG-550. I said there is no meaningful difference, but the graphs show HPS may have marginally better uniformity.
Yeah, that’s why my COB array produced better results. My fixture has multiple powerful light sources spread across a 42”x42” frame. So I suppose based on that logic, it should be blatantly obvious that my fixture is better than a 26”x20” fixture. Since you’re so skeptical, hop over to the HLG-550 product page, load up an online graph generator, and input the values yourself. Its going to look identical to what I’ve posted, but at-least then you will know these aren’t fabricated representations of the product's performance. And to amend your skepticism of the HPS graph, you could purchase HIGH QUALITY components this time, and then invest in a good quantum sensor. The data you produce from this test will also be nearly identical to what I’ve shared.
Common sense would suggest you observe the data I’ve posted and try to think about it as if you weren’t biased towards the light you just dropped a stack on.
Sure. Kinda’ hard to miss though, wouldn’t you agree?
https://horticulturelightinggroup.com/collections/all/products/hlg-550
I made the graph myself using the data provided on HLG-550s product page. You can do the same, and you will receive the same result. Let me know if you have any trouble.
Ding Ding Ding! We have a winner.
”I have it that” – What do you even mean by that? What is it that you have? Go make the graphs yourself. You can literally copy exactly what I’ve done within the span of 8 minutes. If you don’t believe the HPS graph, that’s all fine too, but that means its time for you to go do the tests yourself.
Contempt prior to investigation – The mantra of HLG cultists.
