► [ Runtime \ Beamshots \ Review] Sofirn C8G. New king of budget long-throwers (21700, XHP35, Ramping mode)

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Scimmy
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Very impressive and this might just be the upgrade from my SC31 Pro

Enthuslight
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Where to find upd 5000k?

Helo
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Just a heads-up, the C8G is going through some pretty significant changes. They’re moving to the SST40 LED and likely a FET driver so aside from the exterior, it’ll be a completely different light.

See: https://sofirnlight.com/sofirn-c8g-xhp35-hi-2000lm-p0059.html

Serlite
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Helo wrote:
Just a heads-up, the C8G is going through some pretty significant changes. They’re moving to the SST40 LED and likely a FET driver so aside from the exterior, it’ll be a completely different light.

See: https://sofirnlight.com/sofirn-c8g-xhp35-hi-2000lm-p0059.html

It makes me a little bit sad to see them go that way. (It reminds me of how the SP33 V2.0 lost its nice regulation in successive iterations, for only a slight output improvement.)
I hope they’ll consider bringing the old version back to sell alongside the SST-40 model if they can secure a supply of XHP35.2 emitters!

Tendou
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I missed buying the xhp35.2. have to skip the c8g this time

rrc2020
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I bought my Sofirn C8G last December 12, 2020 from Sofirn’s official Lazada store. The ad said: “Powerful 21700 LED flashlight Cree XHP35 HI 2000lm”. But further down, it also mentioned: “Specification: SD05 updated to SST70 LED recently in 2020, Nov…”

I couldn’t make the connection with the SDO5. So I don’t know whether I got the Cree XHP35 or the new SST40. However, I noticed something in the switching sequence of the light. Not sure if this has been posted already but I thought to share it here. When it is ON, regardless of whether stepped or ramping, I can turn it OFF by simply pressing the side switch OR pressing the tail switch.

Here’s the curious part. The light will then remember which switch you used to turn it OFF and will refuse to turn back ON unless you press the switch that you used to turn it OFF.

For example, if I turned it OFF by the side switch, I can turn it back ON by the side switch only. It will not turn back ON by the tail switch. Likewise, if I turned it OFF by the tail switch, I can turn it back ON by the tail switch only, not the side switch.

This wasn’t in the manual but I was not bothered with this. I bought the C8G as I was nostalgic of those flashlights of old, with tube and “flared” head.

Tendou
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Is it sst70 or sst40?

rrc2020
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Tendou wrote:
Is it sst70 or sst40?

I assume it’s SST40 based on Sofirn’s website description about the new C8G. I’ve no idea why the SD05 with SST70 was mentioned in the ad for the C8G.

Rolz
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Great review, thanks for posting

dave1010
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rrc2020 wrote:

Here’s the curious part. The light will then remember which switch you used to turn it OFF and will refuse to turn back ON unless you press the switch that you used to turn it OFF.

For example, if I turned it OFF by the side switch, I can turn it back ON by the side switch only.

Yeah, I think this is how most dual switch lights with a mix of e-switch and physical switch work. You can think of the switches as bring in series, so they both need to be on (logical AND gate).

I wrote quite a bit in the dual switch UI in my review of the C8F, which may be helpful:

https://davestechreviews.wordpress.com/2020/09/21/sofirn-c8f-tactical-fl... (scroll down lots)

rrc2020
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I see. Thanks Dave. This is my only C8-type torch so I didn’t know how these 2-switch C8s work.

WindyCity
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Great review! I do like the fact it has two buttons and the three LED compared to the C8+, I own a M21A myself so wonder how that will compare since it has a 21700 battery too. I wonder how the coating will hold up. I think Convoy has one of the best anodisation, Sofirn also looks more shiny (and cheaper but that is a personal opinion of course)

d_t_a
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rrc2020 wrote:
I bought my Sofirn C8G last December 12, 2020 from Sofirn's official Lazada store. The ad said: "Powerful 21700 LED flashlight Cree XHP35 HI 2000lm". But further down, it also mentioned: "Specification: SD05 updated to SST70 LED recently in 2020, Nov..."

I couldn't make the connection with the SDO5. So I don't know whether I got the Cree XHP35 or the new SST40. However, I noticed something in the switching sequence of the light. Not sure if this has been posted already but I thought to share it here. When it is ON, regardless of whether stepped or ramping, I can turn it OFF by simply pressing the side switch OR pressing the tail switch.

Here's the curious part. The light will then remember which switch you used to turn it OFF and will refuse to turn back ON unless you press the switch that you used to turn it OFF.

For example, if I turned it OFF by the side switch, I can turn it back ON by the side switch only. It will not turn back ON by the tail switch. Likewise, if I turned it OFF by the tail switch, I can turn it back ON by the tail switch only, not the side switch.

This wasn't in the manual but I was not bothered with this. I bought the C8G as I was nostalgic of those flashlights of old, with tube and "flared" head.


The Sofirn C8G previously uses XHP35-Hi LED, but now uses SST40 LED.
The Sofirn SD05 previously uses XHP50.2 LED, but now uses SST70 LED.

XHP35-Hi is relatively easy to identify vs SST40, since the XHP35-Hi LED is a flat domeless LED, whereas the SST40 is a domed LED.

The XHP50.2 LED is like 4 smaller LEDs combined (so it will show a 'window' pattern, but noticeable only if looking very closely at the LED.
The SST70 LED appears like a slightly bigger SST40 LED. (I think the SST70 is also a combined 4 smaller LEDs under 1 dome...)


!

 

(left side is C8G with SST40, right side is C8G with XHP35-Hi)

 

~~~~~~

 

Left side is Sofirn SD05 with SST70 LED, while right side is SD05 with XHP50.2 LED

 

 

Dioda
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Why did they resort to SST70? Is the XHP50.2 also being phased out like XHP35?

Skylight
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Dioda wrote:
Why did they resort to SST70? Is the XHP50.2 also being phased out like XHP35?

The XHP50.2 has the widely known problems with yellow tint shift in the beam. The SST70 should have a more uniform beam that throws slightly further because of it’s smaller dies.

At the moment there is unfortunately no 5000K version of both, the XHP50.2 5000K production was paused.

d_t_a
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Skylight wrote:
Dioda wrote:
Why did they resort to SST70? Is the XHP50.2 also being phased out like XHP35?

The XHP50.2 has the widely known problems with yellow tint shift in the beam. The SST70 should have a more uniform beam that throws slightly further because of it's smaller dies.

At the moment there is unfortunately no 5000K version of both, the XHP50.2 5000K production was paused.

 

I did a quick beamshot comparing the SD05 with XHP50.2 "cool-white", SD05 with XHP50.2 "neutral-white" and the new SD05 with SST70 LED:

SD05 with XHP50.2 "5000K" neutral-white is probably not really 5000k, but is definitely warmer than the cool-white though.

 

top right: SD05 (XHP50.2 'cool-white')

top left: SD05 (XHP50.2 'neutral-white')

middle bottom: SD05 (SST70)

 

Lumeniac
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i added runtime charts for SST40 version

ggf31416
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Thanks, it’s good to know they aren’t just using an unregulated FET driver, the lack of knowledge of what we were getting was preventing many purchases. Can you access and post pictures of the SST40 driver, like you did for the XHP35 version?

Also there are 3 runtime graphs, what’s the difference between them?

d_t_a
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Really appreciate redoing runtime graphs for the C8G SST40 model.

I wasn’t able to test the C8G SST40 at longer runtime, so I didn’t know that its brightness increases slightly after a few minutes (as per your runtime graph)… I’ve observed most flashlights just decrease brightness (in various degrees) after the initial Turbo..

Can I ask if the C8G SST40 you tested is SST40 6500k or 5000k? (I notice that the new C8G SST40 can come in cool-white or neutral-white, even though Sofirn does not appear to list that — I would think it’s random whether they give the SST40 6500k or SST40 5000k when ordering the new C8G SST40)..

Also, may I ask the tailcap current for the various levels in stepped mode (or just Turbo mode) for the C8G XHP35-Hi and C8G SST40?

(On my tailcap current measurement, I notice that Turbo of the C8G XHP35-Hi is a bit higher than the C8G SST40 — but it’s only the initial Turbo setting tailcap measurement — I suppose since your runtime graph indicates the C8G SST40 actually increases in brightness after a few minutes, that would imply the current consumption will also have increased, just not sure to how much)

(for comparison: I got around 6 Amps tailcap current on Turbo mode for C8G XHP35-Hi, and just around 4.5-5 Amps for C8G SST40 on the units I tested. This is with a nearly-full charged battery.)

Lumeniac
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i got CW SST40 

havent heard that they also had warmer tints.  actually i pointed this to to Sofirn, that installing only CW SST40 is uncool as there is no problem with getting 5000K version of this LED. manager said they would investigate situation.  

hope we`ll see 5000k C8G for SST40 as well as for XHP35 what was 6500k as well,before i wrote manufacturer about advantages of watmer light for long-throwers. 

 

no, i cannot get correct measuremtns for turbo at tailcap. i had serious problems with anything above like 3 ampers. so i cannot help you with this, sorry

 

ggf31416
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I see that the third graph is actually the C8+ that got posted twice. Is the first graph high and medium and the second turbo?

Also, which battery was used for the test, the 4000mAh which comes with the flashlight?

funwok
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Quote:
actually i pointed this to to Sofirn, that installing only CW SST40 is uncool as there is no problem with getting 5000K version of this LED. manager said they would investigate situation.

When talking with Sofirn about Sp35 in SST40 5000K they said right now it was difficult to source SST40 5000K unfortunately. That would be one my favourite lights instantly I believe!

d_t_a
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Lumeniac wrote:

i got CW SST40 

havent heard that they also had warmer tints.  actually i pointed this to to Sofirn, that installing only CW SST40 is uncool as there is no problem with getting 5000K version of this LED. manager said they would investigate situation.  

hope we`ll see 5000k C8G for SST40 as well as for XHP35 what was 6500k as well,before i wrote manufacturer about advantages of watmer light for long-throwers. 

 

no, i cannot get correct measuremtns for turbo at tailcap. i had serious problems with anything above like 3 ampers. so i cannot help you with this, sorry

 

 

left side: Sofirn C8G (SST40 5000k)

right side: Sofirn C8G (XHP35-Hi, 5500k?) 

   (I think the later batch of C8G XHP35-Hi (just prior to Sofirn switching to SST40 LED), shifted from XHP35-Hi that was originally "closer to 6000k" to "closer to 5500k")

  comment: the XHP35-Hi does have a notably more focused/smaller hotspot than the SST40 version)

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