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Hello everyone! I am considering buying QB-like boards from AliExpress. And I really need advice from experienced growers. My task is to make additional artificial lighting in the spring-autumn period (temperate continental climate) in a greenhouse near my mother-in-law's country house...

Bro, this is the so-called Russian / Ukrainian business. As far as I understand Chiled are the Slavs. I'm not a racist, I will say more, I'm Russian, and I always meet this kind of thing. Russians do not understand that the client pays money. I myself own a small online store focused mainly on...

Guys, do you know what is common between QB and other boards on the Samsung diodes? Nothing except the diodes themselves. The boards are even more refined, with the addition of color diodes. To develop MPCB for LEDs is easy. Especially from the single type of diodes with the same...

As you can see, all the boards on top differ (240 diodes, which implies a completely different circuit).

Did you guys hear about the competition? Is it really great to stupidly solder 300 diodes on the board? What is the merit of the creators of QB? You do not consider it a crime to make fixtures on cree cxb, but lamps on samsung diodes suddenly became the object of copyright.

Connect in series, the same as COBs. 1A is the maximum permissible current for red diodes(cree xp-e) If you can make a good cooling, then feed to 1A, if you can not, then it is better to make two lines in parallel in 0.5A (20 * 660 + 6 * 730). If you notice that the interstices will be...

I would in your place took 10*660 + 3*730. Either less or more, depending on the driver current. There are convenient solderless cree xpe stars.

Hello guys! What is the best option of 5000K 70CRI COB? CXB3590-N0B-DB-50E Or BXRC-50C10K1-D-74 Or CLU048-1818C4-50AL7K3 It would be great to look the comparison in SpreadSheet. I want to make a light this config: (2*5000K + 2*3000K on the first driver for veg(~200watts)) + (660nm +...