What is the smallest diameter board for an XPE2?

nottawhackjob · 2018-04-19T13:29:54.000Z

If anyone knows where to buy please advise. Looking at modding some penlight platforms.

CRX · 2018-04-19T13:46:08.000Z

High quality:

international.mtnelectronics.com

MTN XP 10mm Copper MCPCB

Cheap:

https://www.fasttech.com/products/1611/10006929/1554906-11-5mm-aluminum-base-plates-for-cree-xp-g-xp-e-c

https://www.fasttech.com/products/1611/10006929/1554902-12mm-aluminum-base-plates-for-cree-xp-g-xp-e-c

nottawhackjob · 2018-04-19T13:58:53.000Z

Thx CRX. Wish that Fasttech 8mm board was still available too. Prolly come in handy somewhere/somewhen.

CRX · 2018-04-19T14:14:13.000Z

I have three or four 8mm if you need them.

nottawhackjob · 2018-04-19T15:18:38.000Z

Appreciated, CRX. I can live without them though. I’ll mess around with the other diameters first.

Btw, I’m under the first hand impression that the XPE2 especially with R2/R3 bins is highly underrated - specifically to AA/AAA formats.

Surprised it doesn’t get A LOT more attention around here. :student:

MRsDNF · 2018-04-19T20:29:25.000Z

nottawhackjob:

Surprised it doesn’t get A LOT more attention around here. :student:

I love the XPE2 led and have built lots of torches using it. The latest is a Convoy S2+ with dedomed emitter at 2.2 amps, Biscotti and copper board. Its a nice little thrower.

Enderman · 2018-04-19T20:31:44.000Z

The 10mm sinkpad from MTN is the best choice.

DavidEF · 2018-04-19T20:58:10.000Z

CRX:

I have three or four 8mm if you need them.

I have three of the 10mm XP SinkPads that I bought to mod a triple XM diving light with about 28mm inside diameter. I still haven’t touched it, because they’re so small I’m afraid I’ll short something! I can’t imagine trying to mess with 8mm boards.

nottawhackjob · 2018-04-19T22:09:16.000Z

You guys know where it’s at with the XPE2. Thing is what I’m discovering about this kind of underappreciated LED is that besides it being a true thrower it can also spill really nicely if the reflector has just a slight OP to it. Doesn’t have to have but a bit of OP to let her truly “shine”.

A very versatile all-round LED indeed IMO.

Lightbringer · 2018-04-19T22:45:35.000Z

8mm:

illumn.com

8mm XP-G MCPCB

[SKU-201] 8mm XP-G MCPCB

Price: USD 0.25

Fits the XP footprint, which covers the L/G/G2/G3/E/E2.

nottawhackjob · 2018-04-20T01:31:45.000Z

Thx, Light!

Lightbringer · 2018-04-20T02:39:58.000Z

No worries. I picked up a few of each for just that sort of thing, so got some 8s, 14s, 12s, etc.

Enderman · 2018-04-20T06:59:25.000Z

Lightbringer:

8mm:

https://www.illumn.com/leds-drivers-optics-mcpcbs/led-mcpcbs/8mm-xp-g-mcpcb.html

Fits the XP footprint, which covers the L/G/G2/G3/E/E2.

That’s not copper though.
Just a crappy aluminum one.

Lightbringer · 2018-04-20T07:22:00.000Z

Enderman:

That’s not copper though.

Just a crappy aluminum one.

Yah, well, just how much heat can a penlight shed anyway? Al or Cu probably wouldn’t make much difference.

Enderman · 2018-04-20T07:34:47.000Z

Lightbringer:

Yah, well, just how much heat can a penlight shed anyway? Al or Cu probably wouldn’t make much difference.

Copper would still make a difference over aluminum regardless of how much a small light can shed because it has higher conductivity…
The higher the rate of heat transfer to the flashlight body the higher the body temperature will be.
A higher delta T from the body to ambient means higher heat dissipation.
There is no “limit” of heat dissipation due to the size of the light.