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~75% of the mass of almost all living cells is water , thus 75% of the mass all the types of tissues that those cells make is actually water ... After drying a plant tissue (like flower buds ) ,a small percentage of water , still remains at the "dried " product . Normally -on normal...

Brother PSUAGRO ,you're doing a more-than-fine job ,as always ... Don't know if you like stoner rock .. But here's some ( greek ) stoner rock to listen ,next time you go to watch sports ... Kinda relaxing ...:P Cheers and keep up the more-than-fine job ,brother ! :peace:

Fran, I'm not really sure .. But ... Could it be a light parameter / variable that is often underestimated ? That kinda belongs to the "Light Quality " characteristics ... Could it be the " Phytochrome Photostationary State " value of this particular wavelength combo ? The PPS or also known as...

Ok ...One more ...

For robincnn ... These guys rock .... :hump: ( Not me ....but thanx anyway ...) Cheers.

Neat ,brother ...Very neat ! You -absolutely - need to be high for this .... :eyesmoke:

Neither I'm saying that HPS bulbs defy science ,neither that they do not deliver... FGS ! Even green light alone ,can deliver ... " Under blue and green light we found the most outspoken effects: plants grown under green light were tallest with the largest leaf area whereas plants grown under...

http://playground.arduino.cc/Code/Timer1 Two pots ( 10 K up to 100K ) needed .......for setting frequency and Duty Cycle .... Manually A of pot to GND ,B of pot to Vref ,Wiper to Analog input pin ... Just an example of code ....

I'm not sure if this helps ... Maybe in China still the all-mighty "magic spectrum " remains unknown ... but for sure ,in Taiwan ,they know plenty more ,than the chinese ...

@Rompfl.. How exactly you make (program) the pwm " engine " to arduino ..? Any sketches available,to show ?

Too much ouzo ? ( I totally dislike it ,BTW ...) |Why ? What's wrong with that method of applying PWm signals to Dim inputs ....? :confused: I can see that at Guod's schematic, the transistor is shorting to GND the +10V signal .. So when base is High ,0 V is at dim Inputs .... when base is...

Talking about " service life " .... Bridgelux states : (...) Lumen Maintenance Characteristics Bridgelux projects that the Vero 29 family of LED array products will deliver, on average, greater than 70% lumen maintenance after 50,000 hours of operation at 1.5X the nominal drive current in Table...

Still ,a more precise examination could be - even - more revealing... Instead of using " mean dry harvest weight / cycle period in weeks " we should use " mean dry harvest weight / cycle period in hours " And we should include the 10% average HPS ballast losses ,too ... and then ...

Recently ,i got some reports ,from couple of V series users .. Two of them ( not knowing each other seem to follow the same " grow strategy " ... Eco-( logical-of-nomical ) crisis .... Their lights are the same model .. 2X Vero 29 3K 80Ra ,with a max . drive of 2.2 A .With a max plug power...

- Having the Vero 29 3K ,drived quite lower than the nominal 2.1 Amps , close to seedlings ,yes ,up to some extend ,keeps internodal distances ,quite "tight" .. But as the plant grows ,the Vero 29s have to be either be driven harder or more COBs to be added / switched ON . In the first case...

:lol::lol::lol::lol::lol: Cheers. :peace:

Yeap ... "Replacing 1000 W " ,is a very "sensitive " phrase .... As Cannabis market expands ,so some serious issues pop-up ..... http://evanmills.lbl.gov/pubs/pdf/cannabis-carbon-footprint.pdf And some pretty serious companies ,take things pretty serious ,too ...

The efficiency of such a hypothetical monochromatics combination COB , probably is going to be higher ,than the phosphor conversion . Still ,there are other techniqual issues probably ... The homogeneity of wls in space ...Ligfht quality spatial distribution ... But then again I think a flat...

Class II my @$$ ... Have one operating with load ,earthed and with the upper / outer side of your fingers ( NOT the INSIDE one !! ) dare to touch lightly ,either of the heat sinks of the driver ...:fire:... Disclaimer : I 'm not suggesting you, to do so ......Ok ? See how "good" it feels...

It came to me .. Another one of my most crazy ideas .... 1) We are not aware who actually is reading our posts .... 2) As the cannabis cultivation moves towards a better legally termed state , the more the different markets around this act ,will populate , at the same time they will be...