Lighting DIY Mars to Cree Cob conversion

[mrsmall]

Great read thanks,

I was looking up the cob chips after watching the YouTube guy and which size and color do you go for, he said 20-40 volts but I cannot see that spec, only cob 3w-5w-10w Chips, daylight/warm white?
Bit confusing, I would be happy to find someone that would make these for me rather then cock it up myself,
Any clues on the chops to get ?
Cheers

 

[mrsmall]

Hey could you tell me if this is a proper cob led? http://www.ebay.co.uk/itm/1800W-COB...749335?hash=item2a5a306c57:g:heUAAOSw0HVWBL4m
Cause I see loads of little led , I thought the cob were the one yellow chip, not numerous ones?
It's still expensive though

 

[Atulip]

You definitely want the bigger higher wattage chips for DIY. Cree cxb3070, cxb3590, bridgelux Vero29. The wattage will be determined by the voltage of the chip, and the amps you run it at. For example I'm using a single 72v cob powered by .7A. ~50w.

COB is chip on board. Each cob is full of tiny little LEDs. The problem with cheap eBay ones is what chips are they using. I've messaged a few sellers and it seems to be impossible to find the specs of whatever they have. Probably not an upgrade over other cheap Chinese leds.

 

[Balarama]

Hey mrsmall,
are you converting your Mars panel or want one from scratch?
I have some cree cobs on pc heatsinks and they're awesome No need for anything else

 

[Atulip]

Full DIY, that's a good and cost effective way to do it. Cxb3590 on arctic 64 cpu coolers and I'd just hang them individually for maximum customizability.

Converting, mars has the .7A drivers, I would go 1 x 72v Cree cxb3590(whatever color you want, 3500k flower, 4000k all purpose, 5000k+ veg only) per driver. That's probably the easiest way and gets the most use out of existing parts.

 

[mrsmall]

Hey mrsmall,
are you converting your Mars panel or want one from scratch?
I have some cree cobs on pc heatsinks and they're awesome No need for anything else

i dont have any mars or any led yet! i would like to have same as you ,, i am looking for cheap electric with good results!

 

[Balarama]

 

[RockCity]

Great work Atulip - actually making Mars lights worth using.

 

[thetreeman]

Im planning to convert my mars2 400 using cxb2530s on sale here: http://www.cutter.com.au/proddetail.php?prod=cut2827 for under $10 each. I havent pulled it apart to see what kind of amps the power supplies put out, but the video makes it look easy enough. Just need to find a source for the 12.5 x 12.5 aluminum plate....

 

[Ripper]

Im planning to convert my mars2 400 using cxb2530s on sale here: http://www.cutter.com.au/proddetail.php?prod=cut2827 for under $10 each. I havent pulled it apart to see what kind of amps the power supplies put out, but the video makes it look easy enough. Just need to find a source for the 12.5 x 12.5 aluminum plate....

did you mean heat sinks? cause here is a source....http://www.heatsinkusa.com/4-850-wide-extruded-aluminum-heatsink/