My room design with 7 COBs

You don't ever have to apologize for speaking a non-native language, shits hard. You're doing great. I drew a picture for you.

Hope this helps.

Yea, MW and power cord together. Into wall. Which one is third? I don't have it?

The third is a wire attached to the frame so that the frame is grounded. You can use the same kind of wire that you used on your COB's.

I received laser thermometer today. I added 4x4cm fans on my 50x12cm heatsink. I wire two fans on 12V DC, so each fan operates at half power or 6V DC.

Temp at whole heatsink is 30-35°C (3x 1212 @38W on each heatsink). I meassure temps at back of heatsink, side of heatsink and in front (where COBs are placed).
Temp at soldering point is 40°C.
And temp on COB surface (at diodes) is 70°C.

That's good? Better cool down more? Which reading is more important?

@CobKits @RandomHero8913

KonopCh said:

I don't understand. One is power cord/cable, other is from MW driver.
I wire power cord to MW driver and stick it to wall holes. Not good?

Sorry, english is not my first language.

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brown wire is LOAD green wire is GROUND, grey/other wire is NEUTRAL. Connect these three wires to your plug to go into wall. Pay attention large spade connector at outlet is NEUTRAL, smaller connector is LOAD. You can stick objects into the large connector which is why it is NEUTRAL. LOAD or power on the smaller protected one. Ground is angled in your part of the world.

VegasWinner said:

brown wire is LOAD green wire is GROUND, grey/other wire is NEUTRAL. Connect these three wires to your plug to go into wall. Pay attention large spade connector at outlet is NEUTRAL, smaller connector is LOAD. You can stick objects into the large connector which is why it is NEUTRAL. LOAD or power on the smaller protected one. Ground is angled in your part of the world.

Click to expand...

Sorry, I don't understand you fully. First, my light already working. As I said, I wire three cables from MW driver to 3 cables at power cord and put that into wall. An voila, light appears.
But... I see guys ground up heatsinks... As I understand, this prevents from killing you if something goes wrong and you touch heatsink. So I need this, better safe than sorry, right? So... how? You say I don't need this because in EU is different wiring or what?