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Led or hps? you could structure this decision by what is easier for you: keeping the led tent over 80 degrees or keeping the hos tent under 80 degrees. While hps has a top temperature for good growth leds have a minimum temp. Remember to factor in plants and transpiration, if you can barely keep...

At what point to take clones of clones: how long must you wait or even at all? I know you have to wait for a few weeks a month in order to take clones of a seed planted plant, basicly wait until it shows sex. But in the case of clones from a clone (which already showed sex) how long should...

Before getting a new dimmer you can try just disconnecting the dimmer entirely, this should make your driver revert to 100%. If yes then get a new dimmer, i think they are googlable as 100K ohm pot led dimmer. In case you find that the driver wont go any higher than where it was stuck then you...

Sorry, wasnt talking about the hlg datasheet, just how samsung and mfters makes their datasheet: i really doubt its just based on measuring output and rather figure out what number to put to make it look as good as possible while minimizing any liability risks of being outside spec. Edit: i...

Drivers run a little bit less efficient when turned down on low, best thing is to have a driver closely matched to your power requirements. With just a little bit extra just in case... But 320 over 4 boards should be plenty for any 3x3. HLGs recomendation from before is a 240/2board kit so 320...

A - internal pots; sonetimes both for voltage and current, very neato A - external dimming AB- internal and external dimming by current, generally most adviceable. Some say it also comes with voltage adjustment but seems like at least not on all models, havent seen one to confirm.

Im really not the right person to ask, i dont follow that so closely anymore. If you just want straight white you can do Bridgelux or samsung branded strips. I know @Jonesfamily7715 recently did a diy based on arrow components; maybe they have a better grasp on where price and performance meets...

Yes to all, + keep temps from going too low at night, clean bottoms of plants and keep air moving under cannopy, if venting air into your space make sure whatever is on the intake spot doesn't have any mold.

Check out arrow aswell, they have discounts many times, there is a thread about it somewhere and a few peeps here that keep track of when pricing is cheap there. Cutter and growlights australia are good aswell, running their strips very happily.

Worldwide distributors: digikey, arrow electronics, mouser... And future electronics.

Maybe i should specify a bit; flashing far reds at lights out, not on during the entire dark cycle; you would see endless stretch. End of day far red treatment is based around photosystem I and PSII; when PSII is dominating that means the plant starts to switch into sleep mode, or at least in...

There is absolutely no benefit in running Far red at lights on, only at lights out, and the time should be calculated depending on output.

Only if it reaches deep down into uv which most dont

Its not stated in the paper as "prove no effect" it sure is how its touted around forums by most. Most people dont really understand the finer points of research (as you do) and see "no statistic significance" as the same as proven not to work. I dont have any comments on that video, ive only...

I have a few issues with Bugsbees UV research (the paper, not seen the vid): - Spectrum and supplemental model: they add uva and uvb in almost equal proportions and same duration, also uva/violets has almost with no cover between 375 to 450nm. Usually the proportion is 1:20 uvb to uva in...

You may be speaking about one of those ozone generators that clean and sterilize the air.

Constant voltage is a thing on the driver side, not the same thing on the chip side Constant voltage means your driver will out put current at a constant voltage, not how the chip reacts to voltage and current at the output side. It basicly means that when you buy a chip (cob or whatever) it...

Purpling: you can also argue purpling being an effect of the high irradiation response; too much light intensity with not enough heat creates anthocyanin (purple pigment) to accumulate in stems/petioles. The plants in this case looks a bit hungry to me, either a bit more feed but much better...

The spec is indicating min, average and max voltage rating at test current of 2.2A.

OP: did you clean the bottoms and prune lower "sucker" budsites? If you maximise the amount of budsutes and dont clean out the bottoms the plant is going to use some of its resources for small lowers and sucker bud which wont develop completely. The plant looks good and healthy.