Cool. Now I noticed they do measure LEDs in lumens, and I do see colored LEDs measured in both lumens and CRIs, (whatever LOL),
A link maybe ? I would like to see which led manufacturer does that ..
CRI figures for monochromatic leds ?
Lumens for blue & red leds ?
Link ,please ....
And I hope ,is not going to be an Asian led maker .....
because that's what the industry uses and they don't care what we're using the LEDs for per se, they're just trying to give panel makers/dealers/us some kind of standards to use, (the wonderful thing about standards is there are so many to choose from
, I forgot who said that), so my question SDS; is there a situation when looking at a panel's performance to grow can be perceived by using photometric units?
I've already answered to that question .Only one case .
I would think there is, like cooling performance at the junction temple to see if the LEDs is running to spec by using a luxmeter program on your phone.
Have you ever tried that ?
Are you aware that leds need special measuring equipment far more advanced than your joke-of-luxmeter phone software ?
There is another more accurate way ,to do what you describe ,by just using a fast-reading polymeter/voltmeter ....
Maybe not the best way (or example), but is it a way? (Rhetorical Alert!) You can't completely belittle lumens for the simple reason we're stuck with them.
WoW! So that's it ! 'Cause we're stuck ,we 've to use lumens ,huh ?
Well,by all means ,go on doing so ....If it makes you happier .....
It does not mean ,that it is the right way though ....
Sure you can prove situations where it fails, now do the world a favor and prove that they can be used, at least in a few situations, just to make someone's choice a bit easier. Make a lot of people very happy if you could boil it all down to something more manageable with the info of what the average grower is given.
I feel very sorry,but I can't .My powers are limited to learning the Laws of Physics and apply them to my builds -designs .
I can not re-write or even manipulate ,the universal laws of physics .
To me a LED panel is a system, not just a light. You need all the tools you can get to look at all it's parts. Right? So basically my point was/is, and without going to the end's of the internet to prove it, lumens mean something to a grower.
Yes ,lumens mean something to a grower ...Absolutely Sh!t ......No more-no less ....
That's all I'm sayin. Did we really NEED a retort from you after? And in essay form.
For you ,I do not see that it was useful .Probably nothing can be done about your case ...
For others I don't know ...Neither you do ....
About what ?
And if I'm ,why you care so much ?
Are you willing to comfort me ?
You know, people will ask questions if you let them and that will help them understand what you're sayin and help to you prove your point.
Well yes ..Usually that's how it starts ....
Not brow-beating them with data, which is also my other point.
Sh!t ..I always thought that this is the most scientific way to back-up / give proof about any sort of " claims " ...
Just suggest me ,another way ,please .....
You can keep shouting at everyone and answering people's questions like they're stupid and be ignored by many people or you could calm down, come down off your soapbox, and get with the community.
Well ,maybe I'm a smart-ass ....
But for sure,I'm more than clever, from people who used to claim :
-You can't grow with cheap asian leds
-You can't grow with white leds
-You can't grow with wide angle lens
-You can't grow without blue leds
-You can't grow with 1 Watter leds
-You can't grow with green light
To mention just a few .......
So ..Let me be in my "soapbox" ,please .....
At least there ,is Truth ,ruling things ....
I'm sorry, SDS but you don't know it all. Want to know why I know that? I grow plenty of great weed without ever have listened to a word you say about growing with LEDs. Later.
Yes ....
As also they are people ,who listened to me and grow better than you ....
Or you are so naive ,to think ,that is because ,of what you trust and believe as true ,makes you a good grower ?
Still ,growing good weed ,has nothing to do with lumens as a useful unit or no ....
It takes whole lot more than that ,to grow weed....
But since you want to measure who has it " larger " ....
Ok .....
Our grows will 'talk' ,by themselves ,Mr "Later " ...
And pay some attention now : "Later " can be " Too late " for ya !
And you know why ?
'Cause you're "satisfied" with what you have and do not care about any advancement or evolution .....
Fran ...You can't teach an old dog ,new tricks .....
Just go back in your dog house and stop barking ...
Chew on to your so beloved " photometric lumens and your great weed " ,steak- bone ....
Others we have the right ,to search deeper ,and inform everybody else ,about our findings ....
Even if that makes some people ,feel really stupid ...
Or makes them loose profit ....
C'est la vie ....
distributions are provided as a spreadsheet in 
