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> Image source < Mimic nature ? Pulsing UV ? Switch ON for 5 minutes ? Calculate total power per day (DLI) and then average it per hour and dose the plants ? In what way should the UV irradiation be used ? Severe damage is very easy to be done to the plants ,when playing with such high...

Thanx ! As it was bulky ,heavy and noisy ... But it could switch OFF itself ,if the temperatures rised over a certain limit . An arduino was in charge of the whole real-time temperature monitoring and power control thing . But with four powerful fans ,temperature monitoring was an overkill...

I have not read the whole thread ,in order to have a more complete picture of what was discussed about the effects of UV light on cannabis ,but since it has been somewhat of a “holy grail “ as long as I can remember ,there has been plenty of research in the past also . At your post there are...

....google translation ... :P Lot of ...

Nowadays , DIY your own grow lights is so easy like never before... Looking back at some of the designs of mine and I really wonder if were worth the effort .... Image source

Thank you very much ,sir . I considered plasticine as an option and ruled it out ,as I thought that the resin solvents might dissolve the mineral oil of plasticine,thus contaminating the resin ... Cool tip with the neutral color shoe polish ! I can find PVA locally for really cheap. Isn’t that...

Be safe ,brother.

Switching power supplies ,like LED drivers are operating in the range from tens of kHz to a few MHz . Since the operational frequencies of WI-Fi are 2.4 GHz and 5 GHz, it’s quite unlikely that a certified and quality LED psu will interfere with the Wi-Fi data transmission . But ... In the...

Just arrived ! https://electrolube.com/product/ur5634-optically-clear-polyurethane-led-potting-compound/ @Prawn Connery I need your help ,please. I will use this PU potting compound for covering the LED devices of 8x Photo Boost strips from PLC. Each strip has 96x LM301 having a height...

When an ordinary rubber band can cause damage ... https://e-neon.ru/image/catalog/pdf/Application_Note_Chemical_Guide_Rev.1.0-2.pdf (...) Besides from natural sources, atmospheric H2S originates from livestock production and industrial processes, such as the combustion of biomass and fossil...

I disdain to reply anymore. Have a nice day,sir.

Unfortunately ,moving elsewhere is not that easy .The “ job opportunities“ life chapter here in Greece tends to become a short,bitter joke. But thank you anyway. At the suburbs of the city I’m living is cited a vast industrial area , with two steel factories ,a plastic pipes factory ,several...

It’s the same planet that you live onto. And if you are totally unaware that in certain industrial areas on this planet people living there wore masks long before COVID-19 and that many times the visibility due to air pollution drops down to a radius of few hundred meters, then you must be a...

Using any form (COBs,modules,strips,etc) of phosphor conversion white LEDs, at any CCT from 4000K to 2700K with a CRI of either 80Ra or 90RA,either supplemented with monochromatic reds at 630 or 660 nm or not , with a PPFD of: -500 umols/sec/m^2 = Good results start from here and on ... -750...

With a small difference there ... Acrylic was an option for conformal coating ... Potting compound is something else. But both serve the same purpose ,of course. By all means ,you ‘ve every right to do as you wish with your LEDs.I prefer mine to be protected as much as possible .And since...

I’ve almost forgotten this .. https://www.rollitup.org/t/astir-grow-led-panel-project.563118/ Back then ,when growing with white LEDs was considered madness, a waste of money and light ... When red & blue LED grow lights were the mainstream. Uh-oh ... Luckily , few of us we had a very...

There’s also the Urethan 71 from Kontakt Chemie .A PU cc without UV tracer.Still it’ s a bit yellowish in appearance as it is stated at the product’s TDS. https://uk.farnell.com/kontakt-chemie/urethan-71-200ml/lacquer-urethane-71-200ml/dp/801069 EDIT: For my next DIY LED grow light...

Most of them are quite elastic and do follow the expansion-contraction rates of the components they are protecting. Furthermore the coatings are so thin that most probably can’t exert forces that will displace soldered components .

Thank you for the link. It seems that most CC of any chemistry do have that nasty UV tracer used for inspection . Very difficult to find a CC without UV tracer. That thing gets absorbed by the LES/lens of the LEDs and do cause a permanent CCT shift towards cooler temperatures.

Yes,acrylic will not adhere to silicone LED LES or dome lens .And there is where the issues start to evolve . Gets worse as the surface of the LES gets larger and as the acrylic coating gets thicker . I really wonder what is this simple solution that Teknik has found ....