LED PAR ratios

[SDchris]

Does anyone have PAR reading ratios of some of the common settings/fixtures. That is, say a Radion G5 running AB+.
I'm not interested in the actual par itself, but the PAR ratio between individual colours.
So set the AB+ schedule and the turn off all colours except one and take a PAR reading. Then similarly for the rest of the colours.

Cheers

 

[mike550]

@SDchris what does the PAR ratio tell you?

 

[oreo54]

Does anyone have PAR reading ratios of some of the common settings/fixtures. That is, say a Radion G5 running AB+.
I'm not interested in the actual par itself, but the PAR ratio between individual colours.
So set the AB+ schedule and the turn off all colours except one and take a PAR reading. Then similarly for the rest of the colours.

Cheers

Percents are pretty much "PAR" measurements. Slightly better because it includes UV a bit.
Thanks to @luxdium for the below data..
Pretty "standardized" if you ask me.. 80% "blue" ( inc UV/violet) to 20% "not blue".
90% for "actinics" 70-ish for high k halides..
much less for the daylight varieties 35-50% (6500-14000k)

Legibility is a bit compromised to fit in as much as I could..

Phoenix full scale so you get a better legend.

OK worse than I expected..
Top left clockwise:
g4 Pro ab+, G5 Blue ab +, ATI Blue plus, ATI Actinic, Hamilton 20000, Ushio 100000
Next 4 are the "test spectrums" from the Coral labs paper, forgot which Radium they used.. Radiant plus, PHX 14, LPS, AB +

 

[SDchris]

@SDchris what does the PAR ratio tell you?

Hey Mike,
I gives me a direct comparison between different led fixtures and the settings they use. Different fixtures have different amounts of colours and use various led brands, having different efficiencies and drive currents. The common thing is the output to which each colour contributes to PAR

I have a DIY unit and its the only way I can compare spectrums.

 

[SDchris]

@oreo54 Thanks
The blue spectrum has a little bit too much overlap.
I know I can guess a little with that but was hoping for more of a direct comparison between royal blue vs blue vs violet......

 

[oreo54]

@oreo54 Thanks
The blue spectrum has a little bit too much overlap.
I know I can guess a little with that but was hoping for more of a direct comparison between royal blue vs blue vs violet......

Violet is separated. the "royal blue" vs "ice blue" is usually not done even by Dana at least as a diode.


Reefi..

When running the Uno at 100% power on all channels:
UV-A = 6.3%
Violet = 27.6%
Blue = 40%
Green-Blue = 2.4%
Blue-Green = 2.8%
The 400nm LEDs (4 of them) at 100% = 71% in the UV-A range, 20% Violet, 2.3% Blue.
Four 420nm LEDs at 100% = 3.1% UV-A, 80.1% Violet, 12.2% Blue.
Four Violet LEDs = 1.2% UV-A, 60.7 Violet, 33.1% Blue.
Ten Royal Blues = 0.9 UV-A, 4.9 Violet, 88.3% Blue,
Six Blues = 0.6% UV-A, 0.7 Violet, 73.8% Blue, 12.8% Green-Blue.

I get what you want though, it just isn't popular as a metric of measure.
Could be physiologically speaking rb and blue are just...blue..

 

[SDchris]

Violet is separated

No it's not. A Radion G6 has most of its violet peaking at 430nm Which is right in the middle of blue and violet on the pie graph.

the "royal blue" vs "ice blue" is usually not done even by Dana at least as a diode.

Yes, but in this case I don't care about action spectra or electron transport chains. It's about visual colour and fluorescence and there is a massive different between those two

 

[oreo54]

No it's not. A Radion G6 has most of its violet peaking at 430nm Which is right in the middle of blue and violet on the pie graph.


Yes, but in this case I don't care about action spectra or electron transport chains. It's about visual colour and fluorescence and there is a massive different between those two

Flourescent pigments have rather large absorption bands..

Coral Coloration: Fluorescence: Part 1

While coral coloration is today less likely to be the subject of intense interest (and debate) within the hobby than it was just 5 years ago, the situation is much different in peer-reviewed literature, with researchers producing a staggering amount of information on marine invertebrate...

reefs.com

 

[SDchris]

They might have wide adsorption bands, but again this graph has no value in relation to LED colour choice and output intensity. The reality in real life is small changes in LED intensity between 455nm and 470nm makes a big difference visually.