The general Sofirn development thread

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Di_Joker
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Sofirn wrote:
At this time some say hope Sofirn can take over the Utorch UT03 groupbuy. I noticed this project was started one year and a half ago, that’s why I’m asking how many people still want it.

Do you want to count those who want to buy Utorch UT03 in this thread or create a new one? Or other survey methods?
I’m definitely interested! I am in!

Sorry for my poor english.

Freedom
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21700 lights with protected cell fitment for those who will not allow unprotected cells anywhere near what they value.
Differentiation is the key to success in this already crowded category of budget lights.

Domari Nolo “I Refuse to be Subjugated” (1st Pennsylvania Regiment Flag) https://www.1stcontinentalregiment.org/blank
(Flagguys.com):..and man o man did they ever refuse to be subjugated. These guys were everywhere. They were important in Washington’s siege of Boston. They stayed behind and were the last to leave after covering the main army’s dangerous nick of time retreat from Long Island. They crossed the Delaware with Washington. They were “..at Brandywine, Germantown, Monmouth, and every major skirmish, and battle all the way to Yorktown..” where they fought “the most important part of the siege” according to General Steuben. These guys saw action in every one of the original 13 colonies.

PBWilson
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I remember the Utorch UT03 and was bummed when it was shelved. I’m glad that it is being looked at once again.

I recall the price being a bit more than what I was willing to spend, but I had the feeling that it was a quality light. The machining looked amazing.

Could you give us an estimate about the price it might be?

Also, please consider offering it in NW!

SKV89
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For me, the UT03 is not that interesting anymore. Since there’s a bunch of high powered soda can sized flashlights already. The MT03, M43, and ROT66 is already adequate. However, I would be interested if it had USB-C recharge and functional cooling fins to allow it to sustain high output in order to be practical. I wish there was USB recharge with the ROT66 because I hate taking out the batteries to recharge so often. It’s a big hassle.

Speaking of sustaining high output. Maybe Sofirn can come up with a new flashlight/host with excellent heat dissipation capabilities to sustain 3,500 lumen output from a XHP70.2 or 4x or 7x emitters from 21700 cell. This would make it a very practical and unique light that does not yet exist. Here are some examples of functional designs that maximize surface area for heat convection and radiation.



http://images57.fotki.com/v256/photos/1/141020/531519/P1010550-vi.jpg


Klotski
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Upgrades to these lights:
SP10A
*Built in USB C charging
*Narsil or ramping UI like current SP32 V2
*Side switch like SP32 V2
SP32 V3
*Deep pocket carry clip black
*Built in USB C charging
*Power bank function
*Optional 21700 battery version as well
_C8F 21700 _
*Built in USB C charging
*Power bank function
*Narsil or ramping UI like current SP32 V2
*Side switch like SP32 V2

BlueSwordM
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Let’s do some tweaking on what you proposed:

SP10A

*Ramping UI like SP32 V2
*SST-20 emitter option(5000k/4000k)
*Side switch like SP32 V2

SP32 V3
*Deep pocket carry clip black
*Built-in USB-C charging
*Optional 21700 version
*SST-20 5000k/4000k

C8F 21700
*Same UI
*SST-20 5000k/4000k
*FET tailcap switch only instead of E-switch+tailcap switch

That’s about the only thing they should change.
Their lights are already great, and these changes are extremely easy to implement, unlike USB charging/powerbank function and a smaller NarsilM driver, and less costly.

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

Di_Joker
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Who might be interested in UT03 or Q8 +XHP? It is needed not for record brightness, but needed for long work without overheating in high modes. Cooling fins are needed, but they are not critical. It is much more important to use efficient emitters XHP. I will give the data that I have. They show for example what the big difference between C8F and SP33+XHP. The cooling area of the C8F is larger than that of the SP33, but the SP33 has a very big advantage in working without overheating.
Some analogues have a high price, others have problems with a new driver, and someone does not use effective emitters XHP.

Sorry for my poor english.

mihlit
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C8F 21700 – having E-switch+tailcap was the reason why I bought it.
Also I agree with Klotski. USB charging makes light more attractive. Not only for me, but muggles usually don’t have huge flashlight collection and they probably don’t have 18650/21700 charger laying around. When I have the chance, I will always charge battery in high quality charger with thermal sensor(protection), where I have control over everything. BUT when traveling, going on vacation… it’s really nice when you can charge your flashlight with cell phone charger, because you always have it or someone else does. I don’t want to carry yet another charger.

Lightbringer
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mihlit wrote:
BUT when traveling, going on vacation… it’s really nice when you can charge your flashlight with cell phone charger, because you always have it or someone else does. I don’t want to carry yet another charger.

That’s why I always have a Folomov A1 thrown into my bag. Takes up about as little space as a folded-up charging cable, and will snap onto anything from a 14500 through 32650 like nothing.

They were on a flash sale at GB recently, <5bux, so I grabbed like 6 of ‘em. Silly

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

mihlit
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but you still have to take yet another thing with you. Also, as it does not know anything about that battery (flashlight would), it uses too high current for 14500 and 16340 batteries. I’d probably use it if I did not have anything else, but it’s not my first option. (I will now go buy one… for… science Wink

diesel72
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Sofirn -
If you make something along the lines of the UT03 or a version of the Q8 with 10,000+ lumens, I would buy one. Either 4× 18650 or 4× 21700 would be fine, UI like a Q8.

Di_Joker
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About the interface. I like the UI SP33 and Anduril.
It seems to me important that the user has a choice of what to use ramp or fixed modes.

Sorry for my poor english.

teacher
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Di_Joker wrote:
About the interface. I like the UI SP33 and Anduril.
It seems to me important that the user has a choice of what to use ramp or fixed modes.
+1 . Agreed on the UI of the SP33. The more I use it, the more I like it! A quick double click to Turbo, and a quick single click back to the brightness level you were in.
And the choice of a good ramping UI is a must I think. Thumbs Up

I do not care about any tint warmer than 5000K.
High CRI… I can take it or leave it. It is not a priority to me.

I do not care about USB charging at all, be it Micro or C.
However, if a light must have it; there should at least be a very substantial tight fitting plug covering the port. Better yet is a covered port like the Zanflare Z1 has!

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

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Sofirn
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thanks for all the ideas, we will take them into consideration, more opinions are welcome.

hank
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Sofirn, are the user manuals for flashlights available as text or PDF files?

I’d like to edit one down to have a miniature instruction page for my SP32Av2.
It does things I can’t remember.

prototype3a
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I just got a C8F 21700 version and a SP33. I actually purchased the SP33 to give to my “Muggle” inlaws as a less expensive alternative to the discontinued Fenix FD-40.

SP33 – I wish turbo was brighter and there doesn’t seem to be all that much difference between the regular levels. I don’t really care for the UI on it. The e-switch is a little hard to locate on this light by touch but I generally like the size of it. I wouldn’t mind though if the head was a bit larger to make it easier to distinguish which end is which by touch. I think Fenix got this right on the FD-40. I don’t know if the slight outward flare at the lens was required for the optics but it definitely makes for a nice to hold light. I would make the crenelations on the head a bit more pronouced so when the light is on and standing on the head, more light spills out.

C8F 21700 – I love the multi-UI as you can choose what you want. The beam pattern kind of stinks with the triple reflector. Based on my Emisar D4 and the reviews I’ve seen for the Fireflies E07, it seems like multi-emitter heads with TIR optics make for nicer (floody) beams. I really like the tint of this light better than the ~6000k SP33 I don’t know what color temp LEDs are used and I haven’t taken it out yet to compare to my Nichia 219 equipped D4. The threads on the tail switch need to be phased so that the rear switch can be reached with the thumb while the mode switch is pressed with the pinky finger.

I’d love to see a light with the UI of the C8F but with 4 or more emitters and an option for a 26650 body as I find this diameter more comfortable to hold. Also, I wouldn’t mind seeing 2× 21700 or 2×26650 bodies if the drivers can handle the extra voltage. Adding a second cell might also enable the lights to maintain turbo longer since the cells aren’t stressed as much.

tundraotto
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Samsung LH351D options

Tom E
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Yes, +1 for the LH351D's.

The LH351D 4000K 90+ CRI's look great in the SP36 (just updated tonight). I hit about 4700 lumens on not fully charged VTC6 cells.

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+2 for the SST-20s 4000k

Their tint and R9 color rendering is even better than the LH351Ds, are easier to find in China, and a bit cheaper, and are way throwier than the LH351D.

BTW, @TomE, have you received the SST-20s yet?

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

Klotski
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I would like to see something similar to the Nitecore MH20GT, but with USB C charging with Narsil or ramping UI like current SP32 V2.

Di_Joker
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I would like to see something similar to the NITECORE LR30 (replaceable 18650 or 21700, and maybe even a version 26650), but in the aluminum body, perhaps slightly larger for a heat sink, and HiCRI Warm or Neutral white.

Sorry for my poor english.

Sofirn
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hank wrote:
Sofirn, are the user manuals for flashlights available as text or PDF files?

I’d like to edit one down to have a miniature instruction page for my SP32Av2.
It does things I can’t remember.

Hope this helps
https://drive.google.com/open?id=1RVRM8E2o1axpRUjAXsqGdaNiSCbyq40R

Tom E
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BlueSwordM wrote:
+2 for the SST-20s 4000k Their tint and R9 color rendering is even better than the LH351Ds, are easier to find in China, and a bit cheaper, and are way throwier than the LH351D. BTW, @TomE, have you received the SST-20s yet?

No, not yet - don't have a tracking #.

Lumens - how does the SST-20 compare to the LH351D in lumens in real flashlights? SST-20's have to be defined for what they are. They compare great against a 219B or 219C in the 3000K/4000K high CRI version, but it's the SST-20 5000K/6500K that does better in throw than a XPL HI, slightly lower than a XPL HI in lumens. The SST-20 4000K has less lumens than a XP-G2 S4 and about the same throw.

The SST-20 5000K/6500K seems to be a great stock 3V thrower with a slight sacrifice of lumens compared to a XPL HI.

The SST-20 3000K/4000K is also a great thrower for what it is, but considering it's high CRI, it sacrifices lumens and throw to get there.

 

Using the only real world comparison I know of from here: https://intl-outdoor.com/emisar-d4s-26650-high-power-led-flashlight-p-932.html, though wish they had the LH351D 4000K 90+ CRI in the mix.

 

From the D4S listing:

OTF lumen output and candela at start-up

XP-G2 S4     : 3300lm / 40,000cd

Nichia 219C : 3000lm / 20,000cd

XP-L HI        : 4300lm / 45,000cd

XP-L HD        : 5100lm / 27,000cd

SST-20 6500K: 4200lm / 58,000cd

SST-20 5000K: 4000lm / 55,000cd

SST-20 4000K/3000K 95CRI: 3000lm / 41,000cd

 

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You can find more Sofirn manuals on my sharepoint, both in English and German language:

https://drive.google.com/drive/folders/1e1IWuBMaDQu-YjuigGpMwdUPErdUrMhe?usp=sharing

Upcoming manuals are yet to be included and therefore marked in brackets

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

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I’d be interested in a C8F triple 21700 with side e-switch only and shorter tailcap.

Emitters: 4000K-5000K, high CRI (such as SST-20 4000K 95CRI). Bonus points for under BBL.

Colours: dark grey, dark green/khaki, sand/tan, maybe even silver/clear.

UI: I haven’t used the current C8F UI but my preference would be Anduril or NarsilM so I don’t have to remember yet another UI!

contactcr
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Tom E wrote:
LH351D

To put it into perspective djozz measured a Q8 LH351D w/ bypass at the following numbers:

4990 lm at 3 seconds, 4760 lm at 30 seconds

It isn’t comparable to a D4S directly but it does compare to what you already know about XP-L HD. I’d guess no less than 4,000lm

Tom E
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contactcr wrote:
Tom E wrote:
LH351D
To put it into perspective djozz measured a Q8 LH351D w/ bypass at the following numbers: 4990 lm at 3 seconds, 4760 lm at 30 seconds It isn't comparable to a D4S directly but it does compare to what you already know about XP-L HD. I'd guess no less than 4,000lm

We just need some apples to apples comparison for lumens and throw. I'm sure there's a big difference between a 5000K 80+ CRI and 4000K 90+ CRI LH351D. That D4S page is the only listing I know that really, in theory, is a great comparative list, though we know nothing of the specifics on those tests - cells, measurement equipment, methods, etc.

contactcr
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Tom E wrote:

contactcr wrote:
Tom E wrote:
LH351D
To put it into perspective djozz measured a Q8 LH351D w/ bypass at the following numbers: 4990 lm at 3 seconds, 4760 lm at 30 seconds It isn’t comparable to a D4S directly but it does compare to what you already know about XP-L HD. I’d guess no less than 4,000lm

We just need some apples to apples comparison for lumens and throw. I’m sure there’s a big difference between a 5000K 80+ CRI and 4000K 90+ CRI LH351D. That D4S page is the only listing I know that really, in theory, is a great comparative list, though we know nothing of the specifics on those tests – cells, measurement equipment, methods, etc.

That was for a LH351D 4000K 90CRI

The 80CRI has a significant jump in output and the 70CRI even more since it comes in the highest bin:

Here are my own 18650 C8F builds (LH351D 80CRI vs XP-L2 70CRI): http://budgetlightforum.com/comment/1332835#comment-1332835

contactcr
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I have also built Jaxman E2L triples with most of these at some point, going through my post history:

LH351D 4000K 90CRI:
~3,300lm at startup

SST-20 J4 4000K 95CRI:
~2,400lm at startup

rost333
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Klotski wrote:
I would like to see something similar to the Nitecore MH20GT, but with USB C charging with Narsil or ramping UI like current SP32 V2.

+1

Also I would like 21700 version and (personal preference) Samsung LH351D 4000K 90+ CRI or SST-20 4000K 90+ CRI option.

It could have a little bigger reflector size, i.e. like Lumintop GT micro

I think it would be first on the market: 21700 palm size thrower

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