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1212 version 6, no freight and no tax for us in the EU. http://www.ebay.de/itm/5x-CITIZEN-CITILED-LED-Chip-3000K-COB-module-CLU048-1212C4-303H6M3-F1-Version-6-/222502560277?hash=item33ce2fa215:g:QIIAAOSwYXVYz-ky Rilla.

TMC.eu is the best for me. But 1212 on Ebay. Rilla.

The problem with the cheap cobs is that we never know anything about then, only the wattage. That´s makes it impossible to predict if they will work as a grow light or not. We don´t know the spectrum and the amount of light they produce and the sellers just steal data from different producers...

I think I must share my experience with some Chinese cobs I have used. I used them for chili and tomato seedlings but wondered why it seemed that the plants did nog grow very well. The lamp had 2 different cobs a cool-white and a warm white, lumens about 15000.( I know but I don´t have the meter...

Wow, you can even smoke the stem.:shock: Rilla.

Looks very good.

Here: http://www.ebay.de/itm/5x-CITIZEN-58-8W-LED-Chip-3500K-CITILED-cob-module-CLU038-1206C4-353M2K1-/222366199624

I have a few Chinese cobs and one lamp I made is with 2 100W driven at 50W. Now I made another lamp with the same size driver but one Citizen 1212 3500 90 cri instead. It seems that the one Citizen produce the same amount of light as the 2 Chinese combined, that´s with half the power. No more...

I looked at my HLG 185 and noticed that there are shrews so it should be possible to take it apart. I wonder if you can take it apart and solder wires on the place where the internal pot is placed. ( remove the internal pot) or you could change the original pot with another. I would do that but...

Sounds strange to me. I measure 20000 lux from my 100W china led run at 50W at the same distance.(30 cm) Disclaimer: Yes I know, lux and lumens are for humans. Rilla.

If you have a serie that don´t light because of one cop you can find it by short cutting the cops one at the time, when you hit the one that causes the problem the rest will lit up. Rilla.

You don´t need a multimeter for that, a piece of wire will do the trick. Rilla.

NO

I wish we had a Copkits in Europe. Rilla.

You can get a lux meter for 10$ at Aliexpress. Rilla.

You are welcome. But I would not like a 10 turn pot because as it says it needs to be turned 10 times for tall the way up and down and you can not make a scale to easy see how it´s set. I just bought these: http://www.ebay.com/itm/401296759607 Rilla.

Watt´s is not important for this use and if it was then 2W is better than less. Rilla.

For whom it might be of interest. I ordered some clu 48 from Ebay. http://vod.ebay.de/vod/FetchOrderDetails?itemid=222366283299&transid=1884582008012&qu=1&ul_noapp=true Good price I think and from Eu so no extra vat etc. for Eu citizens. Rilla.

I think that your glue has slipped and the cob´s therefor got so warm that the solder melted. It will certainly ruin the cob´s if it happens again. Rilla.

Yes, people love to say that but when the lumens is in the same spectrum as the plants can use I do believe that it can compare. By the way, lumens can all be used by plants but some spectrums plants can use can not be seen by humans, it´s not the other way around! Rilla.