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Had a look at the cxms, i wouldnt sneer at 2.5umols, pretty darn good spectrum. Low green and wide reds. A 2.5 light at 33w/foot gives the same levels as a 2.75 at 30w/foot and same as a 3.0 at but using 36w instead of 30w... I dont feel theres any point to be too shy with the watts as long as...

Yes, youll get very varied numbers from trying to calculate and from people having tried things that either worked or not, and usual everybody seems to think that what they did is the only Truth. I think varied results depend much on varied applications, efficiencoes and actually on what...

Its hard to comment on a system without over view but yes, you need your space to not be cold in one side warm in the other. We had a similar problem winter time a few years ago: we resolved it with ducting running around the place and cutting some holes in the ducting to get cold air in from...

Ill get back with a detailed but but probably rambling response, i got copiloting to do (gps map reader on the danish country side) and some family stuff going on. But yes, i think your probably right in first and foremost try whta you can with what you got already. Happy to give my opinions...

Sounds like you got quite a plan and project there. Ive done uva leds the last year, thru various different lights and i really like the results, except for where there was a lot of blue already where it seem to stunt a bit. Our best results was with lights that incorporated high and wide reds...

When it comes to vpd your not after a "correct value" youre after healthy transpiration, visible by "leaf boners" : leaves not being saggy, but properly stretched out. Adjust environment towards better transpiration but really watch the plants for reactions. When you see them happy youre at the...

Not much info to go on here, spectrum is pretty standard looking. Are you growing in a tent? Those lights look like the need very high hanging height, more for green houses if understand correctly its 1200w from a single bar? Thats going to do a number on any tent grow since it needs great...

Im not stateside so not my circus or monkeys: Ive voted in 2 different countries and always had to show some form of ID, seems common sense to me. How would you resolve two voters both claiming to be the same person? But what with the complicated situation in the US shouldnt the state guarantee...

This thread is where all the other holidays converge to celebrate Festivus

I honestly dont know.

I think the both of you are saying the same but with different words, at least thats how i understood you both. Of course inverse square law applies to each diode but the cumulative effdct is that light falls of slower but is less intense at a given height. Hard to explain in words but ive seem...

Remember you can mix lighting to get the best of both worlds ;)

Just an idea: next time with this genetics, try adding a little infrared light thru some low watt incandescant bulbs. Or even CMH, seems to be the most forgiving lighting. It may be that this plant doesnt doesnt like led lights which carry no IR heat; the plants experience of light intensity is...

I think the uv part is mainly for attracting, you need the one with a zapper. Good luck, the fight with the gnats is never over.

Good to see you up again! For gnats you can try my mums trick: mix some sugar, water, soap and vinegar in a wide container and place it where the bugs are. Keeps em down and at least a bit busy.

That many white hairs means its still got way to go, but a bit hard to see clearly with the lighting.

Lm301b / 301h : its the same diode. Exactly the same, only difference is in binning (testing for output) : bs are tested for lums (which measure brightness to the human eye) and hs are binned using ppf (plant related, measures output in photons) and the h is always top bin. Waterproof, extra...

Ive fiddled around a lot with uv and had really good results with uva. But those things are mucho expensive! 7 euros per diode, even with seoul viosys is robbery. And that puck only uses near uva, no deep uva 365nm. Please talk to me after xmas about alternatives ;)

Well i would have to have a look at this :) setting up for myself again when i get my flat back next year.

My favourite weed ever is Y Griega, a cross between amnesia and kali mist. Excellent happiness weeds that feels like you light a sun filled with love an relief inside your chest. Do you run any uv?