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Actually assembling the COB's is not that hard, especially if you have changed the cpu on an older computer (where you had to actually screw the cooler to the motherboard). I am running 4 CXA3070 @ 1400ma for 75x75x160cm, and i think i might have overdone it. But the units produce very little...

You can go by just fine without the holders. SupraSPL uses thermal paste and kapton tape to hold the cobs in place. And some cobs come with screw holes so no holder is needed. But a holder can make it solderless. That was a big advantage for me, as i am not very good at soldering.

The 50 watt driver and led you linked is a COB. But it is not a very efficient one. The reason the cree cobs are popular is because they use more of the electricity for actual light. So a Chinese 50 watt might only give the same amount of light as a 2 5 watt cree. It is hard to say for certain...

On one cpu cooler you can use any led up to 100w. But it is not big enough to add anything else because the base is not big enough. If you are on a budget I would try to get hold of larger heatsinks. Old stereo amps is one way. And i would only use the 3 watt leds, say 10 per heatsink. That way...

The heatsink will not be large enough. And i would rather build with cree leds, or some other manufacturer that present some stats. That way you know what to expect. Is your plan to replace your lighting or to supplement? If you plan on replacing I would use the 3070 cxa from cree and supplement...

I only had to pay the IVA, where I am from you have to pay IVA if the value is above 25usd. And the only way to get around it is to buy from China, they always say value is 10 usd. Ups sent me an invoice a few days after they arrived. shipping was 5 Usd if I remember correctly. The leds arrived...

I also have 4 Z2's that i bought from mouser that look the same, with the 3070N and the smooth edges. So either mouser sent me AB bins for the price of Z2's, or they have started making all 3070's look the same. I think the only way to find out for sure is to measure the light output, and i know...

I bought mine from mouser.com. They should ship to all of Europe. It was their Swedish division that billed my order, but they sent them from the US.

i bought 4 z2's from mouser, and they have 3070N written on them and no serrated edges. Does this mean that i might have gotten AB bins? They were also packed in a padded box, and not in the plastic containers i have seen others get their COB's in.

Thanks alot Guod! I am running 230VAC, so i will buy a pack of the 0.8A fuses and holders. And always safety first, that is the reason i asked :-)

I have now dived headfirst into my own DIY led project and ordered 4x Cree cxa3070 and 4x MeanWell lpc-60-1400. But after reading around a lot i have two questions that i have not been able to find the answer to, so i was hoping one of the guru's here could lend a newb a hand :-) First, do i...

I am looking into what to get for a 2x2x5 tent, and i was thinking of buying 4 cxa3070 3000k and 1x5000k all running at 1400mA. But apparantly i have missed the 50w/square feet, and 250w is then way too much. So now i am leaning more towards buying 2 of the cxa 3000k @ 1400mA and building one or...