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thank you. With now having a nice stash from my first grow I try to improve in efficiency this time, thats why its only 160Watts. I read about Defoliation, would you do something like that? Just in a way that the lower growth gets a bit more light.

so i guess its like - 3 People 3 different opinions lol What Dr Who said about the light made most sense for me, I think

Hi, Distance like this, shot with Flash only: Im using DIY built Led Panels Exactly 162W from plug. As you can see 6 plants are jammed up in there pretty tight. Maybe thats where the lack of light comes from? Its only 74cm x 54 cm Flowering day 28, steadily tied them down.

thank you. So everything is all right? Dont you think they look a bit too heavy on N due to the dark colour of the leaves on top?

Hi, generally speaking i think my plants look nice. But from time to time I find a couple of leaves that look like this: That Looks like P def doesnt it? some of the plants: I think they are a maybe a bit too green on the top? I ferted them last week with 1grow/1ml/L Bloom Its organic...

did I miss it or are the lab thc results still to come?

Hi, did you make a cost calculation? I took some random Equipment with the names of the items in it (some 1000W Horti eye, one "raptor" Hood, and one Soli Tek Ballast 1000W -though there r different raptor Hoods with different Price tags etc). So i came up with about 500$ for the HPS Equipment...

ah, thank you!

Isnt that what you are talking about? Philips CDM-T 930 G12 MASTER Colour ELITE 150W 29$ 150W? On Amazon. At least its Philips and has CDM and elite in its name, so i figured... :-)

Oh noes, some 18$ 150W CDM elite is just as good as the best cxa leds right now?.....so I guess it should beat all those A51, HansPanels, AT600 and whats not...that really made me sad :-( Hopefully asking: isnt there a Major downside to them?

Hi, I cant download the pdf, i get redirected to the main page of that filedropper site. Does it work for others?

Awesome, with all those Videos and comments on how it went down. I was wondering: recently I found this Review: http://cpl.usu.edu/files/publications/factsheet/pub__4338884.pdf by Utah state University. They compare all kinds of growlights to gavita 1000W and things. From that document it...

Yea that thought about what could be done with led is one thing...I guess I should put that aside for now. I think its more important to clearify how (beneticial) the effects of increased temperature on leaves are induced by hps IR beams. Because light + IR-increased-leaf-temp reminds me of what...

I think, if I increase the temp , the rH% decreases more quickly compared to what is immediately vaporized... This difference creates a driving force that makes the plants transpire more. Yes, slowly over time the rH% will rise again, upon reaching the same rH% as before the temp increase u now...

do you agree with me or not? I dont claim im right, its just what I think. SDS, wikipedia: "If the temperature rises in conditions of constant pressure, then the dew point will remain constant but the relative humidity will drop." Maybe those IR beams are HPS' secret Sauce ;-)

Heyho, the Picture Shows what i thought there: Warm Air can hold more water vapor, so the same amount of water in warmer air leads to a decrease in rel H. If you now further decrease the temperature than 10°C, then relative humidity would stay at 100% but the water would condense, decreasing...

Hypothesis: at same umol Levels of hps and led and constant RT (room temperature), hps delivers additional IR beams heat resulting in increased leaf temperature. At very high umol Levels leaf temperature becomes a limiting factor (enzymatic and chemical reactions), besides CO2 Levels. At same...

I could keep reading this excange of arguments for ever :-) Thank you Supra, others and Sativied. As I am usually more interested in leds I think these insights into "professional" horticulture are a very good and interesting read. Because I bet many people wondered "if led is that good, why...

Very nice. I like the 8 cxa baseline idea.

How did u notice that about Magnum led? http://blog.hydrogrowled.com/2013/12/10/led-grow-lights-greed-has-taken-over/ So that chloro guy/Girl ;-) = hydrogrowled. Why does hydrogrowled buy lights worth 45k from bysen? And why r there "hints" on that chloroba Homepage like this: So this entire...