Sofirn C01R - XP-E2 deep red AAA keychain flashlight

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Wrathbringer27
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2 pls

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so can bones.

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dk21291 wrote:
Lux-Perpetua wrote:
84 pcs accounted for already. Thumbs Up Only 116 pcs left to make it happen. ;)

Has Sofirn confirmed that with an interest list of 200 they will produce a run?

They are very much interested in making this happen. The only real constraint I was told is an MPQ of 200 pcs. They did not tell when it's gonna happen if it's gonna happen, though. Anyway, I'm confident that they may be able to accomodate this small batch within the next C01S production run.

 

Barkuti wrote:

Lux-Perpetua be sure to tell Sofirn to avoid being tight fisted when purchasing the photo red emitters, i.e. to preferably get a high flux bin XP-E2 since the bulk per unit cost differente will be very small. BLF user koef3 and user Köf3 in TLF tested an XP-E photo red ≈3 years ago. Worth taking a look. Also, since the C01S driver is rated for ≈1W the driving current for the XP-E2 photo red could be slightly raised without exceeding the maximum rated power. To 450 or 500mA, a current sense resistor swap is all it takes:

(...)

Photograph of the stock driver courtesy of djozz. Wink

Presuming 350mA stock driving current swapping the R27 by an R20 means the current goes up to ≈472.5mA, which is compensated by the photo red emitter's low Vf. This would help making the torch brighter at ≈600mW raw output (close to 25 raw emitter lumens). All in all, it could surpass 20 OTF lumens in high. Innocent 

 

Your input is deeply appreciated. I will ask them to only consider top flux bins of any XP-E2 red/deep red they could source. Maybe I get to know the exact flux bins their supplier(s) have available to order. I hope to get some results from prototyping with the chance for experimenting with the driver's current. Best would be to have one XP-E2 red and one XP-E2 deep red side by side for direct comparison including outbalanced beamshots. My biggest concern is that some people may feel disappointed about the lower (perceived) intensity with deep red.

Luminous and wired, we'll be glowing in the dark.

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Lux-Perpetua wrote:
… Best would be to have one XP-E2 red and one XP-E2 deep red side by side for direct comparison including outbalanced beamshots. My biggest concern is that some people may feel disappointed about the lower (perceived) intensity with deep red.

For most people the standard red will look noticeably brighter. Those who know will be unconcerned. Complainers can STFU Big Smile and sell their C01DeepRed to someone else, pretty sure there will be plenty of takers.

It would be nice if they were to market both red (red emitter) and deep red (photo red emitter) versions. The deep red version could be advertised with a disclaimer and a lumen output estimation or measurement (which djozz will anyway carry out in his review). 

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Barkuti wrote:
(...) It would be nice if they were to market both red (red emitter) and deep red (photo red emitter) versions. (...)
That would be my favorite scenario, too. But then again, we need to achieve at least 200 pcs MPQ per model, i.e. 200x XP-E2 red and 200x XP-E2 deep red. In my humble opinion, it'd be worth it. Looking back the past days, we already got roundabout 100 pcs accounted for. If things go on this way, the odds are good to have both emitter options available as C01R (= red 625nm) and C01DR (= deep red 660nm) later on.

Since demand for special editions of C01S is extraordinary high (see BLF no ano' edition), Sofirn maybe want to pick up the idea of selling more small batches of incandescent / warm color versions, e.g. XP-E2 red, deep red, amber as well as some ultra warmwhite LEDs like Nichia E21A 2.200K, SST-20 2.700K 95CRI, etc.. This could also attract collectors and completists to buy all versions they have for sale...(just thinking...haha Love Cash )

Luminous and wired, we'll be glowing in the dark.

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Lux-Perpetua wrote:

Barkuti wrote:
(…) It would be nice if they were to market both red (red emitter) and deep red (photo red emitter) versions. (…)

That would be my favorite scenario, too. But then again, we need to achieve at least 200 pcs MPQ per model, i.e. 200x XP-E2 red and 200x XP-E2 deep red. In my humble opinion, it’d be worth it. Looking back the past days, we already got roundabout 100 pcs accounted for. If things go on this way, the odds are good to have both emitter options available as C01R (= red 625nm) and C01DR (= deep red 660nm) later on.


Since demand for special editions of C01S is extraordinary high (see BLF no ano’ edition), Sofirn maybe want to pick up the idea of selling more small batches of incandescent / warm color versions, e.g. XP-E2 red, deep red, amber as well as some ultra warmwhite LEDs like Nichia E21A 2.200K, SST-20 2.700K 95CRI, etc..

I am very interested in C01S with E21A 2000K or other E21A emitters.
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Me, too @ lightdecay. Wink I hate to say it but at the moment I can only offer a chance for a red-light C01S. If this goes well, who knows...

Let's just consider it as some kind of a "pilot project". Sofirn is both highly flexible and innovative as well as customer-focussed in terms of new ideas.

Luminous and wired, we'll be glowing in the dark.

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Lux-Perpetua wrote:

Barkuti wrote:
(...) It would be nice if they were to market both red (red emitter) and deep red (photo red emitter) versions. (...)
That would be my favorite scenario, too. But then again, we need to achieve at least 200 pcs MPQ per model, i.e. 200x XP-E2 red and 200x XP-E2 deep red. In my humble opinion, it'd be worth it. Looking back the past days, we already got roundabout 100 pcs accounted for. If things go on this way, the odds are good to have both emitter options available as C01R (= red 625nm) and C01DR (= deep red 660nm) later on.

Since demand for special editions of C01S is extraordinary high (see BLF no ano' edition), Sofirn maybe want to pick up the idea of selling more small batches of incandescent / warm color versions, e.g. XP-E2 red, deep red, amber as well as some ultra warmwhite LEDs like Nichia E21A 2.200K, SST-20 2.700K 95CRI, etc.. This could also attract collectors and completists to buy all versions they have for sale...(just thinking...haha Love Cash )

Sorry on constantly picking on details, just I would like to warn about E21A 2200K, which is tested by maukka to be the worst E21A tint (all other E21A tint is around 90-95 CRI, even the 6500K one, 2200K is under 90 CRI, and with poor R9 rating). If any warm white E21A projects will be realized, keep it with the 2000K or 2700K, because they have the best result at maukka.

Also, it is again dreaming, but if any time ever, an E21A BLF LT-1 will be realized, a 'moody' variant would be highly appreciated (having 2000K on the warmest end, and 3500K on the coolest end of the tint ramp - 3500K is also a very good tint, which Clemence also loves).

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Lux-Perpetua wrote:

Since demand for special editions of C01S is extraordinary high (see BLF no ano’ edition), Sofirn maybe want to pick up the idea of selling more small batches of incandescent / warm color versions, e.g. XP-E2 red, deep red, amber as well as some ultra warmwhite LEDs like Nichia E21A 2.200K, SST-20 2.700K 95CRI, etc.. This could also attract collectors and completists to buy all versions they have for sale…(just thinking…haha Love Cash )

I’m still waiting for the low-high version of the C01S in other types of anodization. I hope that in any version, the mode order will be low-high.

That said, I would ABSOLUTELY LOVE some other warm options. In fact, I’m pretty much always in the market for new flashlights meeting the following criteria:

- Warm and pretty tint
- High CRI
- Runs well on Eneloops (AA or AAA)
- No PWM
- Starts Low
- No strobe or overly complicated UI

If Sofirn wants to release a version of the C01S meeting those criteria at 2000K, I’d buy a few. Really, anything meeting those criteria is going to have me trying to buy a few. I actually tried to buy over a dozen of the original C01 but some of them were lost in shipping. Sad

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For 660nm I would certainly go for the new 660nm XP-G3 because it has an perceived output (lumen) that is very close to the 625nm XP-E2 which is a big achievement because that implies that the radiometric output is 4 times higher at the same current. I never tested the 660nm XP-E2 but I expect it to be disappointingly dim compared to the XP-G3.

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djozz you are saying you didn't test any photo red XP-E2. As I said in #86 the radiant flux differences between XP-G3 and XP-E2 aren't big, at least according to datasheets. Highest radiant flux codes listed are 33 (525mW @ 25°C) for XP-G3 and 30 (450mW @ 25°C) for XP-E2.

I also posted this XP-E photo red test by koef3 @ TLF in #91, notice how the die surface of such emitter has nothing to do with regular XP-Es (much bigger).

 

Hey! What about making a small whip round to gather a few €uros for djozz to test photo red XP-G3 and XP-E2 emitters?

 

Highest bin available for the XP-G3 seems to be flux code 32 (Octopart XPGDPR-L1-0000-00F01 search), and flux code 30 for the XP-E2 (Octopart XPEBPR-L1-0000-00D01 search).

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Please sign me up for two.

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djozz wrote:
For 660nm I would certainly go for the new 660nm XP-G3 because it has an perceived output (lumen) that is very close to the 625nm XP-E2 which is a big achievement because that implies that the radiometric output is 4 times higher at the same current. I never tested the 660nm XP-E2 but I expect it to be disappointingly dim compared to the XP-G3.
Big, if true. Is that claim originating from a trusted and reliable source?
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Djozz + Barkuti,

I just asked Sofirn to try testing BOTH tints as soon as they come to make a prototype. They will now think about the idea buying some XP-E2 deep red and XP-G3 deep red but nothing is for sure right now. They told me they have very few influence on the exact flux bin, though. Until now I guess they have XP-E2 red on stock, only.

I also asked for a C01S with SST-20 2.700K 95CRI but they got another idea, trying out LH351D 2.700K 90CRI that is being used in the LT1 also. Maybe they can also try using different host materials like brass, copper or even titanium. But this should be discussed in the general Sofirn development thread to not derail this interest check. Wink

Luminous and wired, we'll be glowing in the dark.

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2200K E21A has a R9 value of 53 and CRI 91 while the 2000K E21A has R9:89 and CRI:96.
Therefore I don’t see why one would chose the 2200K over the 2000K.

Wine red looks gorgeous. Light red anodisation looks cheapish.

virence.com Nichia E21A sw30+sw40 Wizard Pro ; Skilhunt H03 XP-E2 660nm Photo Red ; Wizard Pro E21A 2000K ; S2+ E21A sw40 d220 (for sale)

 

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Sofirn told me they have difficulties to get Nichia LEDs but Luminus SST-20 is far easier. Anyway, this topic will (hopefully) soon be conducted in another interest check. Wink

Luminous and wired, we'll be glowing in the dark.

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interested!

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Interested in 1 more for a total of 2.

Thanks!

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Up my interest to 2

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For some reason took a look at Samsung 3535 leds section. They market an LH351H Deep Red (SPHRD1L3DH00A4R2D2 Octopart search) and an  LH351H Deep Red V2 (SPHRD2L3DH20E7W410 Octopart search, no hits).

The LH351H may be worth testing against their Cree counterparts.

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Cosmodragoon wrote:
I’m still waiting for the low-high version of the C01S in other types of anodization. I hope that in any version, the mode order will be low-high.

That said, I would ABSOLUTELY LOVE some other warm options. In fact, I’m pretty much always in the market for new flashlights meeting the following criteria:

- Warm and pretty tint
- High CRI
- Runs well on Eneloops (AA or AAA)
- No PWM
- Starts Low
- No strobe or overly complicated UI

If Sofirn wants to release a version of the C01S meeting those criteria at 2000K, I’d buy a few. Really, anything meeting those criteria is going to have me trying to buy a few. I actually tried to buy over a dozen of the original C01 but some of them were lost in shipping.

That’s pretty much what I look for in flashlights too.

Sorry to hear that some of your lights were lost in shipping. The C01 is an amazing little flashlight. It’s bright enough for small tasks, makes an excellent reading light, and lasts a wonderfully long time. If they made more of those in that deliciously warm tint, I’d buy ten!

That said, put me down for at least one of the red ones here. Do we know if they will be low-high?

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Barkuti wrote:

For some reason took a look at Samsung 3535 leds section. They market an LH351H Deep Red (SPHRD1L3DH00A4R2D2 Octopart search) and an  LH351H Deep Red V2 (SPHRD2L3DH20E7W410 Octopart search, no hits).


The LH351H may be worth testing against their Cree counterparts.

I have test numbers in my scratchbook for 625nm XP-E2, 630nm 219B, 660nm XP-G3 and 617nm Osram KR CSLNM1.23-8K8L-24 . Will enter them in Excel at some point and make a nice post. The Samsung led may be for a next test run.

My general impression is that the performance of red leds from the different leading manufacturers are not that far apart, but that the far red XP-G3 is ahead (but has a bigger die).

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Interested

Overkill is just about enough!

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Interested in two units, preferably wine red anodization with deep red LED (660 nm).

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Interested, please put me on the list for one.

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Also looked at Luminus' horticulture stuff. Their SST-10-DR is available in both 90° and 130° beam angles. I'm no expert in optics and don't really know how would this impact the beam profile, but the tighter beam angle emitters may be desirable and the perceived brightness would be higher thanks to a more throwy beam collimation (related SST10-DR-B90 Octopart search). Some SST10-DR-B90-K660 parts in stock at Mouser (Octopart search link here).

Concerning the XP-G3 thing, will it fit under the C01S TIR? Because no way if it doesn't, I think. 

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2 for me

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Chronovore wrote:
[...] Do we know if they will be low-high?

I have highly recommended to use mode oder LOW => HIGH. As far as I know they agree to it as most people seem to like this mode order (see BLF no ano' edition).

Luminous and wired, we'll be glowing in the dark.

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...where Frugal meets with Flashlight!

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