[Pre-Order/Shipping mid of June] Sofirn C01R - XP-E2 deep red AAA keychain flashlight

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Barkuti
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Warm emitters have a lower blue peak and overall less blue light, so I'd say they can hardly be classified as sleep murderers. For example, the SST-20 3000K:

 

Source: Test of a Luminus SST-20-W 3000K 95CRI led

 

That blue peak still looks a bit high compared to other high CRI emitters, check the thread: SKV89's LED Strips and bulbs test results 

The Light Innocent I am

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hank
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It doesn’t take much:

Quote:
exposure to low light levels (5-10 lux) at night when sleeping with eyes closed induced a circadian response.

https://www.ncbi.nlm.nih.gov/pubmed/30311830
mountainair26
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What about the new deeper/photo red Xp-g3 in this style light? Anyone know the expected Vf of that red led vs Xp-e2 photo red?

Barkuti
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mountainair26 it will barely be any different, if anything.

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OtisCampbell
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In for three in raw aluminum if available…

lunchbox
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Interested in 2

agent80
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Interested in one. Thanks.

mountainair26
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Thanks Barkuti, I expected as much. But in this small of light with a TIR, I wonder if the larger led die will make a better flooder, since there won't be much throw anyhow. Additionally, the xp-g3 photo red is supposed to have more light in the visible spectrum for humans, vs the Xp-E2 photo red, which produces a beutiful tint in my opinon, but too many lumens are wasted in the higher spectrum that isn't visible to the human eye, from what I understand. Hopefully someone will post some testing results soon on the new xp-g3 photo red, I also would like to know how the luminus red leds stack up against the cree leds in terms of red color, output, and throw. I hope they can make this light work soon, I'm interested no matter how it the UI and led choice shakes out in the end.

 

Edit: I may have gotten that reversed about the Xp-g3 putting out more visible light vs the xp-E2 photo red. I'm no expert, just going off the info that djozz and others generously share on the forum. I started a thread on red leds if anyone has more input on their favorite "less-orange" photo or deep red led out there:

http://budgetlightforum.com/node/66497?page=1

 

 

Normally I want the most throw (for an outdoors light at night or a weapon light for hunting) but since this light will be for a keychain, I figured flood is the goal. Interested in the 80 degree Oslon in a thrower reflector or aspheric light for its narrow beam angle. I'll try that next since the xp-g3 can't really be dedomed easily (for me), and thus won't help me get more throw like the XP-E2 photo red does. 

CJ Avlis
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Interested…please add me to the list.

agent80
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Is it possible to add a USB charging port. How many lumens on the high mode?

mortuus
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so barkuti u are saying its a bad idea shining 3000k lights before bedtime?

...where Frugal meets with Flashlight!

iamlucky13
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Barkuti wrote:
That blue peak still looks a bit high compared to other high CRI emitters

I expect the figure of merit is not the height, but the total area in the blue region as a proportion of the overall light emitted..

Based the currently ongoing research, some of which has started to examine specific wavelengths effects on melatonin suppression, we’ll probably eventually be able to come up with a weighting factor for wavelength in order to properly integrate an estimate of melatonin suppression.

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I’d be in for one!

Paired with a standard one, and suitable rubber mounts, these would make pretty indestructible bicycle lights Smile

sassaquin
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Interested in one.

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agent80 wrote:
Is it possible to add a USB charging port. How many lumens on the high mode?

Not this time as this project will be adopting the C01S design. However, there are plans to build a very small 10180 light with USB-port already, see here:

http://budgetlightforum.com/node/70011

“Everyone, deep in their hearts, is waiting for the end of the world to come.” (Haruki Murakami, 1Q84)

Starkm32
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Interested.

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Update (January 2, 2020):

Sofirn has managed to create a working prototype. Barry told me they are very satisfied with the beam and color rendition. They have also implemented a new UI with two mode groups (L-M-H, H-M-L), changeable by 8 fast twists. The low mode will actually be a sublumen mode with only 0.5lm. The medium and high modes will be significantly brighter. There's no telling how bright these modes are as Sofirn has difficulties measuring monochromatic light (which is normally always the case with standard integrating spheres). Depending on the current applied to the LED it might be possible to guesstimate the output but it will not be easy to get these numbers.

 

Enclosed you can find a quick whitewall shot (on High mode) made from Barry's smartphone. Please keep in mind that the actual impression with naked eye is different to what you may see on a picture.

 

The actual production of this batch will definitely not commence before February 2020 (i.e. after CNY holidays). Sofirn will be trying to increase the lot size to 500 pcs. Hopefully, we will be successful in raising the demand a bit more. Next step is to talk about the host color. I still vote for the wine red ano with a dark colored clip. We will need to wait and see for Barry's opinion about it as the ultimate color might correspond to Sofirn's plans for the colorful LT1 lanterns (which effectively could lower anodization costs to a very small amount). TLDR: The deep red body color is still an option.

If you have any favorite color you deem best for C01R, please tell me here.

“Everyone, deep in their hearts, is waiting for the end of the world to come.” (Haruki Murakami, 1Q84)

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Wow, that´s good news Thumbs Up

3 Modes with a Sublumen is a good choice;
But I believe deep red with under 1 Lumen is really dark – but that´s O.K. Cool

Actually I can´t see the picture with the wine red anodization?
I would prefer a no anodization (sandblasted) version

Btw: I don´t know if it´s important for you but in the interest list you have marked the TLF members;
I´m also TLF Smile

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Hallo DrDevil,

Barry's picture of the low mode still seemed veeeery bright, so I guess he did not use the latest prototype with 0.5lm in low mode. That's why I decided to post the high mode beamshot only. The wine red anodization can be found in the OP or in post #348, right above your recent post. Wink On TLF I will refrain from posting this picture as TLF moderation will not allow it for reasons of German copyright laws. Sorry, if I did not mark you as TLF member but you have stated your interest as BLF member (post #49) that's why I did not specifically marked you as TLF member. If you want me to highlight your name as TLF member, please let me know.

“Everyone, deep in their hearts, is waiting for the end of the world to come.” (Haruki Murakami, 1Q84)

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Since we confirmed the deep red emitter I’ll double my request to 2 pieces. Any ano color is fine of the three pictured in the op. Red would probably be my first choice though.

I’m not sure if the ‘red wine’ ano color was pictured anywhere, but it’s not showing up for me in the op

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Interested.

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JaredM wrote:
[...] I'm not sure if the 'red wine' ano color was pictured anywhere, but it's not showing up for me in the op

 

Strange...I used abload.de as image hoster, as usual. Can you see this picture below?

“Everyone, deep in their hearts, is waiting for the end of the world to come.” (Haruki Murakami, 1Q84)

JaredM
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No. That one doesn’t show up for me. Checked on my Android phone and PC

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Quote:
There’s no telling how bright these modes are as Sofirn has difficulties measuring monochromatic light (which is normally always the case with standard integrating spheres).

Integrating spheres are actually fine for measuring monochromatic light sources, there is no inherent reason why not. It does demand a more precise spectral sensitivity calibration but that should be ok with a commercial sphere.

There is a reason though not to want to publish the numbers too loudly, at 660nm the human eye semsitivity is very low,
the same radiometric power level that gives you 150lm in white light, gives only maybe 20lm in 660nm. That does not sound impressive (and because it does not look impressive either, it is still fair to use the lumen for these leds).

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Thanks for the information Djozz. I take back my assumption that standard equipment is less appropriate to measure monochromatic light. Maybe there's a way to help Sofirn measure red light more accurately?

JaredM wrote:
No. That one doesn't show up for me. Checked on my Android phone and PC

This is really strange as I can see those pictures here. Apparently, it must be some routing problem between www.abload.de and US internet providers. I never had any issues with abload.de so far. Maybe everything will be resolved in a few hours. If not, I will think about using another image hoster.

“Everyone, deep in their hearts, is waiting for the end of the world to come.” (Haruki Murakami, 1Q84)

djozz
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Could be that they correctly measured 20 lumen at full power and thought that can’t be right Party

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Lux-Perpetua wrote:
Sofirn has managed to create a working prototype. Barry told me they are very satisfied with the beam and color rendition. They have also implemented a new UI with two mode groups (L-M-H, H-M-L), changeable by 8 fast twists. The low mode will actually be a sublumen mode with only 0.5lm.

Glad to hear this is moving forward! And the new UI sounds great. Did they say if this will be implemented in future batches of the regular C01s, as well?

Lux-Perpetua wrote:
The medium and high modes will be significantly brighter. There’s no telling how bright these modes are as Sofirn has difficulties measuring monochromatic light (which is normally always the case with standard integrating spheres).
Lux-Perpetua wrote:
Next step is to talk about the host color. I still vote for the wine red ano with a dark colored clip.

I’m not picky, especially since I know not many anodizing shops offer much variety in colors. However, if they can do a wine red, that would be a great match for a deep red emitter. I’m envisioning and anodizing color similar to the “French Rose” that Sunwayman offered at one time.

If I get a chance, I will try to remember tonight to take a picture of my deep red anodized Sunwayman R01A next to my red anodized Sofirn C01 as a point of color comparison.

DrDevil wrote:
But I believe deep red with under 1 Lumen is really dark – but that´s O.K.

Luminous flux (measured in lumens) is adjusted to human eye sensitivity, where as radiant flux (measured in Watts) is not. So 0.5 lumens of red should provide the roughly the same brightness as 0.5 lumens of white, but the radiant flux will be higher, and the runtime will be shorter.

Of course, how useful the illumination of that 0.5 lumens is will depend on the colors in the scene. Red light won’t illuminate blue or green objects, for example, while white light will.

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Lux-Perpetua wrote:

JaredM wrote:
[...] I'm not sure if the 'red wine' ano color was pictured anywhere, but it's not showing up for me in the op

 

Strange...I used abload.de as image hoster, as usual. Can you see this picture below?

I see it OK on my Windows 7 PC with Brave browser - but it takes a few seconds to load. Perhaps it is a bandwidth issue with the Abload host. It's probably temporary as they have been very reliable in the past. But it doesn't hurt to donate to them from time-to-time to help offset their bandwidth cost. I host pictures with Abload and try to donate some coin at least annually.  

 

 

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hank wrote:
Quote:
Maybe 2.700K is “yellowish” enough to not interfere with one’s sleep?

Can’t rely on color temperature — the output can look quite yellow/red and still contain a significant amount of blue light, which is what murders sleep.
(the blue emission is from the LED layer, underneath the layer of phosphors that converts those photons to warmer ones).

Turns out there are now LEDs driven using violet instead of blue, which solves the problem.

Soraa, founded by Shuji Nakamura, the Nobel Prize winner, announced a new series of blue light free LED lamp


Finally after years peoples begin to consider this problem the inhibition of melatonine caused by neutral and cool white Led lights(by the natural emission of blue from Led)
But they are still the most requested and sold Sad
I would see more very Warm/Amber Leds lights
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Lux-Perpetua wrote:

JaredM wrote:
[…] I’m not sure if the ‘red wine’ ano color was pictured anywhere, but it’s not showing up for me in the op

 


Strange…I used abload.de as image hoster, as usual. Can you see this picture below?



That third image in your first post is hosted on https://www.taschenlampen-forum.de, and apparently you need to be logged into that taschenlampen forum to be able to see that image. I can’t.

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