Lighting A-Train's DIY, Mars 1200 LED to COB !!!!!

[pop22]

Buy the holders! Not only is it a better mount, they can save you from having to solder leads onto the chips!

This is going to be a hard decision... I would like to stay under $150 for chips if possible...

Also I read someone say the holders are not necissary? Will the tape work? I don't want to put in all the work fabrication g them have chips taped to the board that fall off lol...


So @Atulip do you believe 4 top bin 2530 will do the job I'm wanting them to of boosting power for my flowering? Or can I go 6 in line? I think the would be too close and fail easier due to heat I thing yhe 4 is best bet? I need yalls opinion too though

 

[Atulip]

6 would be better. How many heatsinks were in the Mars and how many are you using now? These chips will be more efficient(less heat) but the heat is located in the center, not spread out over many chips. If it had 4-5 heatsinks for ~550w of Mars led, 2 of them should be OK for 6 cob leds. If there was only 2-3 then 1 should be alright. With the fans between each chip probably would work best. But if you counted the fins, measured the perimeter, we could probably calculate how much heat they'll take.


Kapton and arctic silver 5 is fine. All my Mars conversions are like that with some sloppy soldering.


Download the spec sheet, it's in the product code "t2" is the top bin for that chip in that color and cri. Cutter carries all the top bins(and some lower) increasing alphabet is generally better. Y4, z2, z4, AB, BB, BD, CB, CD, etc. But each chip and color has its own top bin. And bins are just a rating of lumens, 90cri 3000k can be more efficient(more photons for the plants) at a lower lumen output(scaled how we see light, with green the most)

That Cree product customizer I linked before is best for a direct comparison of different chips of the same color spectrum at different wattages. (IE 2 x top bin 3070s at 25w each would make more light than 1 x top bin 3590 at 50w.)

 

[Atulip]

Another option could be 4 of those cxb2530 per driver, 2 strings in parallel of 2 chips each. Bumps efficiency up to 52%.($48 per driver) but for that price a single 72v cxb3590 top bin would be 56% efficient, and only one chip needed per driver(and more color options, though 90cri 3000k is the fullest, 3500k 80cri would arguably yield more in the 3590 bins). 2 x top bin cxb3070 per driver would be the next step up(58% efficiency for $60 per driver) and 2x 36v cxb3590 the Cadillac option for $90 per driver and 64% efficiency through the leds. Don't forget the Mars drivers aren't too efficient themselves(86%) so they will waste watts, a driver upgrade may become a cheaper efficiency boost than expensive leds ran low watts. (And opens up more build options)

 

[A-Train]

Ol here's some pics and my plan. Remember this is gonna be in a 3x3 and only run during flower with 2 p300 led. I want it to fit between them
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The mars had 3 heat sinks but I plan on using g 1 it's 5 wide by about 17 long

Here's where I'm at and after talking to yall today my plan is 4 top bin cxb2530 2 drivers and 2 fans.

 

[A-Train]

Opinions? Will this provide an added boost between the LED where the par begins to drop?

 

[Atulip]

Yeah that's a pretty good boost. If that was 1 heatsink using to cool ~130w of heat from epi leds, should be fine for ~55w of heat from 4 cxb2530s.(100w of leds, 45% efficient, 55w heat generated) Make sure the fan is blowing on the heatsink not sucking. The positive pressure removes heat better. But if you are going to enclose the entire thing, blowing out may provide better cooling.


But the fans would be better directly against the heatsinks, drivers too.

 

[A-Train]

They are about 1 inch over the top I'm not making an enclosure the will be a frame mostly and the fans will be blowing over the top of the heat sinks... so that's the plan. You guys stick around and I'll update as I go along. I'll start back on the design tom night at work I'll finish it up next week and order cree when I have the money

 

[Atulip]

That's a pretty cheap upgrade and better than any other 100w led you could get for ~$75.

That's the efficiency where you start seeing $2/watt+ for lights.

 

[A-Train]

@Atulip is this the top bin?

 

[A-Train]

Now I gotta find the right cob holders on cutter lol