MT-G2 or XHP in a P60 ?

beam0 · 2018-04-07T00:01:26.000Z

Need suggestions for a P60 build. I have a Solarforce L2X (2x18650) I’d like to do something special with it.

Can I build a P60 using MT-G2, XHP50.2 or XHP70.2 ?

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I see this build-your-own P60 shell: at MTN.
Takes a 17mm driver and a 16mm MCPCB. I plan to build it myself but I notice for the “Custom Build Option” it shows: “no MT-G2 or XHP70 LEDs”

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Any input would be appreciated, suggestions, info or advise, including driver recommendations.

Also suggestions for wrapping the drop-in to improve heat transfer, best material, method etc.
It looks like (at 3A) I could get around 2000lm with MT-G2 or around 2500lm with XHP-50.2, I think.

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Here’s a pic of my host. It’s the L2X tube, I’m planning on using an L2T head. (different head currently)

KawiBoy1428 · 2018-04-07T00:40:42.000Z

Just get a hold of Randy @ PFlexPro , have him make u a custom 2S drop-in for it, Nobody Does It Better, NOOOOBODY!

Lightbringer · 2018-04-07T01:43:34.000Z

Ummm, 3A might be fine for 1S, but at 2S, power is doubled, don’t forget. That’d be like running a 1S light at 6A, not 3A.

You’ll need to bolt that drop-in right smack into the head and optimise every bit of thermal path for it to not cook itself.

It’ll work, don’t get me wrong, but it’ll get damned hot. The LED, that is, not the case. And that’s the problem.

beam0 · 2018-04-07T16:03:06.000Z

Lightbringer:

Ummm, 3A might be fine for 1S, but at 2S, power is doubled, don’t forget. That’d be like running a 1S light at 6A, not 3A.

You’ll need to bolt that drop-in right smack into the head and optimise every bit of thermal path for it to not cook itself.

It’ll work, don’t get me wrong, but it’ll get damned hot. The LED, that is, not the case. And that’s the problem.

Thanks for the reply. Well I’m a bit confused now on that. What driver are you referring to that doubles the output current with 2x cells, direct drive maybe?

I thought the driver limited the output current, unless it’s direct drive. I was thinking a constant current driver, or is that not possible?

Like this driver: http://www.mtnelectronics.com/index.php?route=product/product&path=67_116&product_id=53

Input voltage: 6-8v (2 lithium ion cells in series)
Current: 3.04A (unless 7135s added or subtracted)

Does this driver double the current with 2x cells??

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I really need some specific driver recommendations.

beam0 · 2018-04-07T16:13:44.000Z

KawiBoy1428:

Just get a hold of Randy @ PFlexPro , have him make u a custom 2S drop-in for it, Nobody Does It Better, NOOOOBODY!

Thanks for the reply and recommendation. I’ve seen he builds excellent drop-ins, but that would be quite expensive and not as much fun

Looks like $50-$60 for ones with a 3v LED, so I guess a 6v LED would cost even more. Definitely will consider if I decide to go the off-the-shelf route.

Lightbringer · 2018-04-08T04:14:19.000Z

Picture a lightbulb, one 6V another 12V. if you’re feeding 1A to each one, the 6V bulb will get 6W (6V×1A) while the 12V bulb will get 12W (12V×1A).

Think of the 12V bulb as 2 identical 6V bulbs in series. Same current, but twice the light.

Just play with the math…

beam0 · 2018-04-08T06:45:59.000Z

I see, so the QLITE 6V+ Zener Mod driver with 2S will provide 6A to an 6V MT-G2/XHP LED?

I wonder why they’re showing 3.04A in the description?

Features:
* Input voltage: 6-8v (2 lithium ion cells in series)
* Current: 3.04A (unless 7135s added or subtracted)
* Constant current

http://www.mtnelectronics.com/index.php?route=product/product&path=67_116&product_id=53

KawiBoy1428 · 2018-04-08T09:48:10.000Z

beam0:

I see, so the QLITE 6V+ Zener Mod driver with 2S will provide 6A to an 6V MT-G2/XHP LED?

I wonder why they’re showing 3.04A in the description?

Features:
* Input voltage: 6-8v (2 lithium ion cells in series)
* Current: 3.04A (unless 7135s added or subtracted)
* Constant current

http://www.mtnelectronics.com/index.php?route=product/product&path=67_116&product_id=53

It comes with 8x.380 7135’s stock 3.04amps you can add more for more current, 16x.380 will give you 6.08amps.

vinte77 · 2018-04-08T12:38:10.000Z

Adventure Sports used to make a P60 copper pill specifically designed for mtg/xhp leds so that you could build your own dropin. I’m not sure if he still sells them but they weren’t cheap, I think they went for around $45.

beam0 · 2018-04-08T15:46:10.000Z

KawiBoy1428:

beam0:

I see, so the QLITE 6V+ Zener Mod driver with 2S will provide 6A to an 6V MT-G2/XHP LED?

I wonder why they’re showing 3.04A in the description?

Features:
* Input voltage: 6-8v (2 lithium ion cells in series)
* Current: 3.04A (unless 7135s added or subtracted)
* Constant current

http://www.mtnelectronics.com/index.php?route=product/product&path=67_116&product_id=53

It comes with 8x.380 7135’s stock 3.04amps you can add more for more current, 16x.380 will give you 6.08amps.

Yes, that I understand.
But Lightbringer is saying it delivers 6A because the voltage is doubled by using 2x cells (see posts #3 and #6 above) That’s what I’m trying to understand.

Lightbringer · 2018-04-08T18:45:52.000Z

Ummm, nope, I was saying it’s twice the power (thus heat), because the MT-G2 and XHP-xx are “6V” chips, not “3V” chips.

So whether you’re supplying 3A from 2 cells in series, or 3A from 1 cell and boost driver, you’ll be burning off twice the heat vs 3A to a single-chip LED like an XM-L.