Photosynthesis Under Solid State Light. Setting the Standards .

Greengenes707

Greengenes707

Well-Known Member
alesh said:
I'll politely disagree on this one.
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He's right. I have played around with a few red mono additions to whites. You can take 80cri white to 97cri with a few 630nm and 660. The 660 additions are where most of the cri increase comes from.

Because you are "filling in" the edges of the spectrum the LER goes down because it's farthest away from the luminosity bell curve.
 
alesh

alesh

Well-Known Member
guod said:
View attachment 3447532
White(2700K) with 660; 630; 530; 450nm
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I was mistaken I can see. I tried simulating of adding XP-E2 reds to CXB3070 80CRI and came to similar graphs. I would never tell that those spiky SPDs can have higher CRI. Thanks for the correction and education. I shall never doubt you again lol
CXB3070 3000K/80CRI alone, with 1,2,3 XP-E2 reds (both running at similar current).
mixing.jpg
 
Scotch089

Scotch089

Well-Known Member
You're not the only one that just learned something alesh. Even if your understanding was intisllt more than mine as a whole. Only way I thought is bring the cri up is if you had a cool white and added reds. Hm. Very cool. Thanks greengenes and guod. Didn't realize the high cri came from the red end, definitely makes sense now.

Alesh how in the fuck are you guys simulating those spds?
 
Positivity

Positivity

Well-Known Member
Remember guod sharing this quite a while ago, the cri increase...those charts are pretty cool. Is the asian website with the spectrum tool still available? I finally got a computer that might be able to run it...although its a mac so probably not...
 
Scotch089

Scotch089

Well-Known Member
Yea but it's outdated. No new chips :( I have the link on my puter but it'll be later tonight that I could get it to you
 
Greengenes707

Greengenes707

Well-Known Member
4K+630 and 660
Screen Shot 2014-11-12 at 1.51.07 PM.jpg
The R9 value of the CRI is what is ususally very low in white leds compared to the rest of the groups. Improving it, affects the cri most ime.
Positivity said:
Remember guod sharing this quite a while ago, the cri increase...those charts are pretty cool. Is the asian website with the spectrum tool still available? I finally got a computer that might be able to run it...although its a mac so probably not...
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Scotch089 said:
Yea but it's outdated. No new chips :( I have the link on my puter but it'll be later tonight that I could get it to you
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It works...just change the output of the selected spectrum to a more up to date output.
Like use "X" amount of 1w xte spectrums to simulate you CX wattage...it's all cree. And change to lm/w or mw/w to what your system/chips is putting out.
Or you can download sylvania/osrams tool(thanks goud). It's nice, and with alesh's spd skill...you can do just about anything.
 
Scotch089

Scotch089

Well-Known Member
So just find a spectrum out of say the crees and match them best you and adjust the lumens? I'll have to fiddle fart later... I don't remember what all the options to tinker were. I just remember adjusting the watts of each color and didn't think it was super close..
 
Greengenes707

Greengenes707

Well-Known Member
I just went on to play on the asian site(http://spectra.1023world.net/)...I have been using sylvania lately.
They updated it I guess...and now you can't change the output...fuck that.
Maybe there is a way, but I haven't figured it out. Lunch is over...i'll try more later. But I suggest just using sylvanias program.

Asian one was a good starter. If the outputs can be changed...it's still worth it.
 
Randomblame

Randomblame

Well-Known Member
Greengenes707 said:
I just went on to play on the asian site(http://spectra.1023world.net/)...I have been using sylvania lately.
They updated it I guess...and now you can't change the output...fuck that.
Maybe there is a way, but I haven't figured it out. Lunch is over...i'll try more later. But I suggest just using sylvanias program.

Asian one was a good starter. If the outputs can be changed...it's still worth it.
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Hi GG!
I think the asian site is down, I get always a 404 error! Did you perhaps a link where I can get the sylvania tool?

The R9 value means "red saturated" and is an additional measurement color, in addition to the 8 pastel shades and 5 other additional measuring colors to calculate the CRI! To add one of these test colors will therefore always increase CRI value, right?
 

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salmonetin

salmonetin

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Randomblame

Randomblame

Well-Known Member
salmonetin said:
...the asian site go... go bad with my too slow internet conexion.. big time till the page charge... ...but go good on other pcs and adsl conection....

...i saw an sylvania tool... ...i dont know if your tool searched...

http://www.sylvania.com/en-us/tools-and-resources/Pages/led-color-calculator.aspx

http://app.sylvania.com/colorcalculator/ColorCalculator_zip.zip

http://assets.sylvania.com/assets/Documents/ColorCalculator_User_Guide.8dcf07d1-9356-4de9-8bb7-db497a8159d6.pdf

saludos
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Hey Sal!
Thanks! Seems to be a bit more stuff to learn again:-)
 
OneHitDone

OneHitDone

Well-Known Member
Ok, so all of the spectral distribution graphs are relative to the strongest wavelength being 100%
But, what is 100% - is there any form of measurement that can be used to judge what that intensity is on each led?
Aside from completely building a fixture and putting it over a par meter?
 
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