nevergoodenuf
Well-Known Member
You can't compare them like that. Each one will have different peaks if you compare at a set wattage. You would have different max peaks if ran at the same wattage.strips, so PAR will be lower. see orange region:
You can't compare them like that. Each one will have different peaks if you compare at a set wattage. You would have different max peaks if ran at the same wattage.strips, so PAR will be lower. see orange region:
These photons do not drive photosynthesis so its useless for a PAR (Photosynthetic active radiation!) meter to count them!see orange region:
have you actually looked at the McCree curve? there is stuff going on beyond 400-700nmThese photons do not drive photosynthesis
i just wanted to show (relative) spectrum differencesYou can't compare them like that.
RQE values...aka McCree curve hard data. How effective each nm(every other nm) is at driving photosynthesis.These photons do not drive photosynthesis so its useless for a PAR (Photosynthetic active radiation!) meter to count them!
They are only relative when to itself. When shown in absolute values, you can see that though some may have different relative ratios, but they still contain as much of more actual amounts of certain nm/ranges.i just wanted to show (relative) spectrum differences
Yeah, wow, a weighing factor of 0.4 to 0. So that is the big pro argument for CRI90 LEDs? Besides that: The RQE chart is just one thing. Leaf absorption chart the other. Combine these two to get a proper, meaningful action spectrum and realise that CRI90 LEDs are pretty wasteful....I mean.... the far red study is interesting, but thinking its a smart idea to create the far red photons with CRI90 LEDs is - in my opinion - the opposite of smart. However, buy your Vesta stripes and be a happy man .have you actually looked at the McCree curve? there is stuff going on beyond 400-700nm
I agree. A PAR sensor will leave the +700nm photons uncounted, and a 90CRI LED will have more uncounted photons than a 80CRI LED. BUT, the photons above 700nm are not discounted by the plant! I agree with GG that the "True PAR" range of 316nm to 782nm is more representative of what is actually seen by and acted on by the plant. And I think the girls like that "deep red" and "far red" action!the problem with this apogee par meter is that it only measures Spectral Range 389 - 692 nm. the CRI90 strips produce more photons outside of that region compared to other strips, so PAR will be lower. see orange region:
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by the way: how do you want to make them tunable? use 1 drivers for 2700K LED row and another for 5000K CCT row??
It does well enough that we're still trying to figure out if one spectrum is better than another when the lower CRI samples generally do better on paper and under the meter. I don't think there's much difference getting the deep red from COBs vs top bin monos, but if someone has some math suggesting otherwise I'd be curious to see.Yeah, wow, a weighing factor of 0.4 to 0. So that is the big pro argument for CRI90 LEDs? Besides that: The RQE chart is just one thing. Leaf absorption chart the other. Combine these two to get a proper, meaningful action spectrum and realise that CRI90 LEDs are pretty wasteful....I mean.... the far red study is interesting, but thinking its a smart idea to create the far red photons with CRI90 LEDs is - in my opinion - the opposite of smart. However, buy your Vesta stripes and be a happy man .
https://www.rollitup.org/t/adding-deep-far-reds-to-quantum-board-build.955848/page-8#post-14186761I don't think there's much difference getting the deep red from COBs vs top bin monos, but if someone has some math suggesting otherwise I'd be curious to see.
SSL 80 660NM is good.....Oslon square 660NM= Whaaaaaattttttt!!!!!!!!!!!!!!With hyper reds it really depends on the bin you get imo. And they are expensive. Osrams top bin pushs out 3.91 µmol/J @ 350 mA. Thats already better than a phosphor converted LED physically (at least with my understanding) can be (3.7 µmol/J @ 100 % efficient).... https://dammedia.osram.info/media/resource/hires/osram-dam-4651433/GH CS8PM1.24.pdf
But don't get me wrong. I do not want to advert hyper reds here.
(But I advert using proper far red LEDs when someone wants - for whatever reason - far red light.)
I know right. But no 80* option, which for me what was so damn appleaning about osram. I would settle for a happy medium. And single bin access would be great. Been dealing with osram lately and it's a little frustrating at times.SSL 80 660NM is good.....Oslon square 660NM= Whaaaaaattttttt!!!!!!!!!!!!!!
Gee I wonder why.....I know right. But no 80* option, which for me what was so damn appleaning about osram. I would settle for a happy medium. And single bin access would be great. Been dealing with osram lately and it's a little frustrating at times.
Hmmm these ones are basically two normal Oslons SSLs in one package... must have beefy chips (would love to see a die shot!)... (Datasheet: https://dammedia.osram.info/media/resource/hires/osram-dam-5066839/GH CSSRM2.24_EN.pdf .... osrams page... jesus fucking christ, worst website in the internetz)SSL 80 660NM is good.....Oslon square 660NM= Whaaaaaattttttt!!!!!!!!!!!!!!
Like pulling teeth lol. Requested quote.......2 months later wants to meet...... to tell us we will get you a quote........ 2 months later gets quote..... lead time is 20 weeks...... I'm afraid the world might end before we see parts lol. We ended up going a different route, adding a few more, and cutting current. Should get us close for now........ then the question is can you trust you will get same bin as sample in production qty......I know right. But no 80* option, which for me what was so damn appleaning about osram. I would settle for a happy medium. And single bin access would be great. Been dealing with osram lately and it's a little frustrating at times.
why don't u work with bridgelux?