DIY LED grow lights experiences
- Thread starter green surfer
- Start date
green surfer
Well-Known Member
OK OK SDS, thinks becomes clearer in my mind now.
Anyhow i will do this experience, only for flowering, i don't want a versatile spectrum, i prefer to search for the best bloom solution: I'm thinking about one engine with 7 LCW CC 2700K the best bin I will found and another one with 4x LCW 2700K / 3x LH. I will ask to Osram for samples, I have already the LH 3T bin SSL80.
I'm happy to be here, I was feeling almost alone since my lasts talks with knna. There are many very interesting people here!
I apologize if I hurted you SDS, but it's not easy to learn to think differently.
Do you think it's a good idea to try 7 WW 2700K CC and 4WWCC/3LH SDS?
I totally agree with you. But most of the time we only have lumens to have an approach of efficiency and choose one led or another.
Anyhow i will do this experience, only for flowering, i don't want a versatile spectrum, i prefer to search for the best bloom solution: I'm thinking about one engine with 7 LCW CC 2700K the best bin I will found and another one with 4x LCW 2700K / 3x LH. I will ask to Osram for samples, I have already the LH 3T bin SSL80.
I'm happy to be here, I was feeling almost alone since my lasts talks with knna. There are many very interesting people here!
I apologize if I hurted you SDS, but it's not easy to learn to think differently.
Do you think it's a good idea to try 7 WW 2700K CC and 4WWCC/3LH SDS?
stardustsailor
Well-Known Member
Well pertaining our discussion there's no one person believing that lumens are how we look at growing
So the truth is yours and the myths are ours?
No....What is 'mine' or 'yours',is what i/ you/ we trust or believe as truth ....
Also who says that xte peaks at 610.. The general graph of the warm whites?
Again you are so sure about things as usual sts
Oh ...Common,now ..
If those graphs did not mean anything ,neither Cree or Osram would have had published them ....
Like when you were completely dismissing hyper reds do you remember? And now you use them in your light
Still ,I do ! But ,of course under different 'conditions" .... (like when used solely with blue leds,at several combinations )
Sorry but your explanation doesn't convince me at all you can't call it ultimate truth, and I believe in photons not in lumens as always
That is correct ,if you do ! I'm not here to convince nobody ...Just stating FACTS !
A simple reading in light physics ,will convince anybody ....
Guod
What do you say on the whole thing?
Yes ...Guod ?
jubiare
Active Member
Yeah sure but, if you look at rebels graphs for es, they have more graphs available for different tints
And comparing them they do differ at different wl's
So I just assume a 2700k differs from a 3500k where it peaks etc?
Cree and osrams have warm whites graphs generic for all the tints
Also, if we want to go with graphs... Why osrams WW would present less far reds than for es. Cree xpe WW? doesn't more far reds come from more red?
And comparing them they do differ at different wl's
So I just assume a 2700k differs from a 3500k where it peaks etc?
Cree and osrams have warm whites graphs generic for all the tints
Also, if we want to go with graphs... Why osrams WW would present less far reds than for es. Cree xpe WW? doesn't more far reds come from more red?
stardustsailor
Well-Known Member
No,of course you didn't hurt me ...
( Besides .... Only my beloved , Guod can do that ...
.. _Just kiddin'.... ) " ...But most of the time we only have lumens to have an approach of efficiency and choose one led or another...."
Yes ..Unfortunately ...But there are special measuring devices for that purpose ...
Or maths ....
Or a friend in the right place ,like yours ....
( I'm also eager to find out as much as possible , for the Oslons ....
Specially for the NW 4000 K color champ (95 cri ) and the WW 2700 K color champ ..
Both of LCW C- Q or R -7P.CC designation ...
As for the Oslon WW & hyper red mix ....
(like the one having in my two GD-SDS prototypes ..Not fully tested yet ! )
I suspect that is a "bud mass building" combo ...
But for vegging or for high aroma/taste bud ,is a 'poor' combo ...
It lacks blue wls ....
That I've seen up till now ...
I'm sorry if I sound hurt/angry/ or whatever else ....
I do not mean bad ...
Just trying ,with my best efforts ,to state some hard facts ...
Sometimes though ,I 'loose' ,the politically correct ,"good manners " ....
Nothing personal ,with nobody ...
stardustsailor
Well-Known Member
Yeah sure but, if you look at rebels graphs for es, they have more graphs available for different tints
And comparing them they do differ at different wl's
So I just assume a 2700k differs from a 3500k where it peaks etc?
Might yes ,but might no,also .....
' Temperature ' describes the "whole" white light bandwidth ...
You can have leds with the exact same Temp,but with total different spectral graphs ..And peaks ,of course ...
Cree and osrams have warm whites graphs generic for all the tints
No ....Both companies have/offer detailed spectral graphs for every color /temperature bin ...
Under request or "hidden" in ray files ,simulation files ,pdfs,etc ...
Also, if we want to go with graphs... Why osrams WW would present less far reds than for es. Cree xpe WW? doesn't more far reds come from more red?
Oslons do have more power in Far red (700-750 nm ),than XTE WW leds have..
And yes , the more deep red phosphor used in a WW led ,the more FR in the led's output light .... Correct .
green surfer
Well-Known Member
no no, all is fine, don't care, everything is all right mate
yes it's very difficult to deal with Osram, Luxeon and Cree datasheets, we don't have the accurate curves...
SDS please check this, may be you don't know this company. They are japanese, they don't do the chips but they are phosphor layers specialist and they design spectrums.
Fortunately I can have easily Stanley stars, and after reading your theories I went back to Stanley datasheets. Check this, they have all curves, many led have a peak at 630, and they have very high outputs.
I would be happy to know what you thing about those emitters:
here is the datasheet: link
graphs:
green surfer
Well-Known Member
I work with Osram, i asked for the graphs, they told me it was confidential, they didn't want to give me the graphs
stardustsailor
Well-Known Member
Well ...The 'known' "Trade Secret-proprietary " wall.....
I 've had it ,many times in my face ....
stardustsailor
Well-Known Member
Nice find ...Really interesting ...
I'll need some time to go through them....
stardustsailor
Well-Known Member
Same here ....
(Must make an Astir-type panel full of CW / NW asian cheapos ,to use along with the two
GD-SDS prototypes ,for vegging purposes ... Until I'll finish the third one ...)
But ..
...It can wait until tomorrow ...
green surfer
Well-Known Member
+1, lost in spectrums
stardustsailor
Well-Known Member
+1, lost in spectrums
As you've said ....
Efficiency (the radiometric one ..) counts more than spectrum ...
At least for vegging ...
When it comes to flowering ,spectrum becomes really important issue ...
Quantity and quality of yields ,are seriously affected by spectrum ,then ...
stardustsailor
Well-Known Member
stardustsailor
Well-Known Member
Must be the CR7P.CC ..
Right ?
(Graph is only an "average" for the 2700 bins/ groups ..)