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I am not able to ost picture by phone, but on vendor's page now are available ppfd reading for a 4 board fixture with an hlg-480 2100 inside a 90x120cm (3x4)tent. Result are pretty amazing comparing to hlg550. It seems to have a much better uniformity and higher ppfd reading...

All interesting info, but off-topic.

So Todogrowled and other shop selling board are out of law?and people in europe who buy from hlg?

Also Different pcb size, voltage and current

None of your link are for a board like mine ( well, not mine since I only bought it ), so I still think I made a good choice. Anyway, good luck with your business. I am interested to your P&P machine

Iphone is just a chinese phone that Apple has imported....There are plenty of boards from Alibaba, but board with genuine lm561c s6 az bin, potential passive cooling, with good footprint and uniformity....are not very common.Find this boad from alibaba if you can.

Tested board with aluminium "U" channel as heatsink.2 board at 260watt from plug. The hottest point(center of board on the led side) was 52° C with T ambient of 23°C and no airfloe.The back of the board was even cooler (from 3 to 5 C degree). Previous temperature was taken from the back too.

Sonoff 4 ch has 4 channel.Each channel can be controlled indivually.If you need to have 4 different timing,than go with 4 channel.If you have same timing schedule for all driver than take basic model with 1 channel in common for every driver.Consider also if max wattage of your system is too...

Take a look at sonoff thread here on Riu. It is a programmable timer, that you can also set or change remote with WiFi. You can use a multichannel model.Do you need to control every single driver independently or you can group it?

I can take readings of my board in open space,but is not a QB. Let me know if it could be useful

Maybe you should read better their policy about shipping: https://growerslights.com/pages/international-orders That said, good luck.

If you plan to get qb 260watt kit it is cheaper if you get it from todogrowled.If you buy from US you have to add at least 40 eur for shipping+ import duties, so spanish shop would be cheaper. I suggested you the board I am using because 2 board are 160 eur, than add 75 eur for driver. At...

If you want a 260watt kit of quantum board, it is cheaper to buy from todogrowled...no custom fees and much cheaper shipping cost. https://www.todogrowled.com/es/hlg-quantum-boards/55-hlg-260w-quantum-board-kit.html If you want a cheaper option look...

I have seen a company in my country that sells your qb304 copy, and they claim it as a product they developed and invented. It is in Europe so.... can you report them or make something about copyright or patent violation?

If you pay to advertise, than you can open your thread with your products, but if you post in every thread than it is spamming, not promoting. Last thing, the board I bought from the Italian shop has more chip, different layout, different voltage and can take a max current of 3000ma, so I do...

I have used cob fixture and now I am using project 342 from Italian shop .In my opinion cob fixture work very well but board can be an even better choice .My measurement (and measurements from many other member) showed me board are more efficient, with better uniform coverage.I do not ever tried...

Does any light guru know ler and qer for: Lm561c 80 cri 5000k Lm561c 80 cri 3000k (should be 321 and 4.86) Lm561c 90 cri 3000k Lm561b+ 90 cri 3000k @CobKits @robincnn @Stephenj37826

Replied to your PM...please do not make my mistake, stay away from that light.That kind of led(noT that model...but same family ) was my first fixture and it was useless.

No...Take ground from driver and directly solder to ground from power switch.Ground is outside the sonoff. Regarding dimming,take 2pcs of 3way wago, than 2 dim+ from 2 drivers goes into 1 wago,2 dim- from 2 drivers goes into other wago.Than take 2 piece of wire( 1 for each wago): 1 wire will be...

PM sent:bigjoint: