[♛ FreemeGB] Fireflies E07 7* Nichia/ SST20/ XP-L HI Emitters 21700 Flashlight Group Buy -【 New Copper+Titanium 】

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efi5phd
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I would like all copper for the best dissipation of heat. Thank you. Or aluminum and copper.

SKV89
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efi5phd wrote:
I would like all copper for the best dissipation of heat. Thank you. Or aluminum and copper.

That’s what I used to think too but it’ll add significant weight for not much additional heat shedding. The majority of the heat shedding is done in the head so copper head makes good sense but body not that much. Also copper will sink heat so fast, it will make it uncomfortable for your hands to hold if the body is copper too. I’m not against full copper body but just copper head seems good enough.

808Hi
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Interested in copper

mihlit
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SKV89: I don’t think that copper head would make a huge difference. It’s not about better, it about pretty Smile

SKV89
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mihlit wrote:
SKV89: I don’t think that copper head would make a huge difference. It’s not about better, it about pretty Smile

Actually it does make a huge difference in turbo runtime. I compared S2+ copper with S2+ aluminum using same pill, the copper can maintain the turbo much longer, maybe twice as long but it also takes much longer to cool back down. Copper also helps with heat shedding since heat transfers to the surface faster but the difference it makes is probably not too significant.

twisted raven
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Seems like the copper would cool down faster than the aluminum.

nokoff
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twisted raven wrote:
Seems like the copper would cool down faster than the aluminum.

it’s more conductive, not more emissive, but it’s going to do a better job of extending turbo with a thermal cutoff, it always does

Nokoff..still Made in China 山寨主義

BlueSwordM
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It also has a much higher density.

Even though copper actually has a lower thermal mass per weight compared to aluminium, it’s so dense it actually eclipses aluminium in both thermal conductivity and mass.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

twisted raven
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nokoff wrote:
twisted raven wrote:
Seems like the copper would cool down faster than the aluminum.

it’s more conductive, not more emissive, but it’s going to do a better job of extending turbo with a thermal cutoff, it always does

I think heat conductivity works both ways, as it’s only one thing. It’s how fast the material transfers energy through it. The processes of heating and cooling down both involve energy transfer. But if we were talking two heatsinks of the exact same size, I could see the much heavier copper taking a little longer to fully cool down because it has much more mass to it, but that’s only if more energy was ran through it in the first place (ie 2 minutes of turbo vs 1 minute)

If we took copper and aluminum and allow both to absorb the heat from turbo for the same time, the higher thermal conductivity of copper means it should completely shed its heat faster than aluminum.

In that same manner though, if the copper were exposed to a level of heat that didn’t oversaturate it within seconds (turbo output), I would imagine it could allow the light to sustain a higher level of constant brightness than the aluminum heatsink.

Unloco
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Copper head + clear aluminium body for me, depending on final price.

noboneshotdog
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I would be interested in aluminum w copper head too, but QC issues would have to be worked out.

I will wait and see before I pull the trigger on FF lights going forward.

Thier ain’t no bones in a hot dog. F. York

KawiBoy1428
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noboneshotdog wrote:
I would be interested in aluminum w copper head too, but QC issues would have to be worked out.

I will wait and see before I pull the trigger on FF lights going forward.


Same here. Would like to see PIC’s as proof also… a copper core pressed into an Aluminum finned head might have been better, it works really quite well in my 19 amp 4200lm 3v 50.2 IRA. But I sure like that Copper head!!!

Did a copper pill X6 3v 50.2 also..it’s quite Heavy…

KB1428 “Live Life WOT

mpak87
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Depending on price, interested in clear aluminum + copper head, though I’d like to know the price breakdowns for full copper or TI body. 5000k XP-L HI with red secondaries if at all possible.

mortuus
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hm saw on Neals fb they discontinued nichia ?

...where Frugal meets with Flashlight!

Charga
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Interested for one clear aluminium body with copper head!

' Lumen est omen '

Hope is no option!

jaynick
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Id buy a copper head+clear ano body for sure.

Ill be buying the copper+ti if not too expensive.

Firemedic
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I think the copper head would look better with the desert yellow. It would kinda match somewhat:)

g_damian
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Interested in copper one. If not available, cu+ti.

MichielSanders
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interested in CU+TI

Olight: M3XS-UT, S Mini CU, R50 CU, R50 Pro LE, M2R, I3T Cu, S30R III, Marauder X6, X7R, X9R - BLF: Q8, A6, GT, GT mini - Emisar: D1s, D4Ti - Reylight: Tripple Dawn, Ti Lan 

Nitecore: TM26GT, SRT9, EC11, T5s, P05Pink, LA10, HC33, HC70 - Fenix: TK75Vn FiatLux, TK76, CL05, CL09 -  Lumintop: Tool Ti, IYP365Ti - Astrolux: MF01 Lexel driver - FourSevens: Maelstrom MMU-X3 

Tally-ho
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Interested in Cu head + Al body clear ano but depending on weight.
The Astrolux S43S is already on the heavy side for me so i’m not optimistic for the E07 copper head with its 10 mm shelf.

Tubercle
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Interested in both titanium and copper versions too!

DB Custom
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The Ti/Cu E07 definitely needs to find it’s way into my hands!

Please make sure you have me down for this beauty!

CM2010
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Interested in titanium and copper.

ollywood
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Cu+ Ti please…

timbo114
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I’m IN for the Ti/Copper

Pöbel
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freeme wrote:

Good news, Jacky is back. He told me that Banggood will receive new batch of E07 within these few days. If you got have been cancelled previously, you might want to try reordering again next week.

fantastic news. I left my order with banggood active for a long time without too much hope that it would ship. It even had the apply for refund option active. Today I checked and it did indeed ship.

4000k XPL Hi sand colored Smile

electricjelly
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Interested in Copper Titanium E07

Light
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Interested in full copper limited edition. I’ve been emailing Jacky at fireflies to get some information. Very excited for this version.

-Max

DB Custom
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Full copper vs Ti/Cu….

The Titanium almost acts as a thermal blanket or shield to protect the cell from intense heat of the 4 emitters, the copper pill will absorb and radiate heat allowing the emitters to run efficiently but the Ti body/battery tube won’t readily absorb this heat, effectively keeping the cell as cool as possible while the light delivers optimum output.

Whereas, a full copper build will pull heat all the way to the tail, surrounding the cell in heat and possibly causing damage or a dangerous situation to the Li-ion cell inside. Yes, it will pull more heat from the emitters, but it pulls it to the dangerous cell within… not a good compromise in my book. And I am probably the biggest advocate for the use of copper on this forum…

As an aside, the Ti battery tube will remain much more comfortable in hand than a full copper build, which would get too hot too hold in short order.

mihlit
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but… but… it’s about looks, I want full copper too Smile Same as I’d like to have full titanium or at least titanium+clear ano head.

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