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Nice, guys, learning lot of things again. Osram seems really good, I have a couple of hyper red SSL I could mix with the 4000K vero 13. Could be a killer mix.:fire: It is just that 10mm stars are a pain in the ass to solder...:wall:

Thank you sds, very nicely explained ! I got all the info I needed. I just I see 45mil Bridgelux are 340mW @ 350mA it is not bad, but far from the 500-630mW oslon SSL are puting out at 350mA. But I actually understood when you said Cob are like fractal... Tell me if this is ture please, using...

Bump !! :) I found Supra saying in another thread "Steves once offerred the Luxeon M E5G bin, which was the the most efficient LED I have ever seen for sale (63% at 700mA)." So wait, how can we achieve 65% efficiency on WW COB while the best blue we can buy are not even 70% efficient ? It...

Hi everyone, I need your help on this ;) I see COB more and more efficients, taking into account the losses from white conversion, how effect are the blue under phosphore ? 80% ? I wonder what are the most affective monos 450nm blue led, and how they compare to the one used in COB. It seems...

True about pig... But no one really know why, it is just suposition... it could just be that human is not animal and as such it has to have some rule and not eating everything, a pig eats everything, so could be a good conter exampe of what human shouldn't do, hence avoid it... ? idk Anyway...

You don't have islamic friend you have muslim friend, you see !!!! be careful... Also I few years ago, I found the swidish christian terrorist killing hundreds of people quite scary... And I found Irish modern invention of terrorism quite scary too, They actually invented this sort of war...

Be careful not to mix everything... This guys are going nower but hell, they are no human being. And they are not folowing any religion, no muslim would kill another human being, whatever his religion, they respect others, and respect themselves. This guys are demon, no link with islam. They are...

It makes sense, but I wouldn't have imagine such high numbers. Thank you Supra ;)

Hence when comparing to light I must refer to this spreadsheet and the electrical efficiency ? It means for exemple HPS plantastar (let say 36% efficient) will be better than a 39% efficient cree ? Then I could apply same method for monos ?!! (Yes I know this is another thread haha)

Hi, I am interested in the HLG 240H 36A/B But I can't figure out how it work, On vero 29 it would make them run at 36V isn't it ? so about 30W each, How can you dimm it down or up if it is constant voltage ? Does it mean all my COB in // could receive less curent and hence decrease their voltage...

I wanted to know, does this means plantastar HPS has a more usable spectrum than 3000K cree or vero ?

Hi, I was just wondering, I saw SDS powering a arduino using the dimming output of his driver +10V. Would it be possible to use for fan ?

Hello everyone, I am in euro to, I contacted Citizen in USA and germany and for people living in france you have to buy from eurocomposant. I just called them and they can sell for a minimum amount of 150 euros, but as they have no CLU56 in stock, minimum order would be 10 COB. The price is...

Then I might try 5000K vero, because 4000K at 1000ppf really gave me good result and excellent g/W ratio.

No worries dude, it happens to everyone ;) You can still try to flower under 6500K so that every one is fixed ^^ @alesh How much do you think might be sufficient ? 1000ppf ? I am already at 1000ppf under 3500K vero

Bonjour from lyon little frog ;) From what is see so far, 3000K + 4000K is about a week in front of my last grow with only 4000Kbut is not from same clone... It just seems quicker to me. Good luck with this sativa !!! do you mind me asking what strain is it ? I would like to grow the y griega...

Thank you alesh, I understood the principle but I am not sure to understand how to do it... should I normalize the Mc cree curve and apply the coefficient to each wavelength of the Led spectrum curve ? I am interested in this because I wonder if 4000K/3500K + red and blue would be more...

Hello, Great share alesh, thank you !! You calculate efficiency of each emiters, But what about efficacity ? I mean, efficiency from a 660nm SSL @ 350mA is lower than a CXB3590@350mA but I guess we have to take into acount spectrum efficiency if we want to really compare them ?! how can we...

Hell yeah isled is expensive but driving CXB at 25W is also very expensive... You get what you pay for in terms of efficiency. His spectrum is very good apparently but I have no idea what the actual wavelength he is using for the last flowering card. Maybe he just added some 740nm in the mix ?!