Sofirn SP70 BLF Edition Development Thread

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DB Custom
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I think Lexel can probably remedy that. Wink

Constant current could be a big attraction.

(I’m not a fan, but a lot of folks are)

JasonWW
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Lexel has been working on his boost drivers on and off for over a year now, maybe longer. I gave up waiting. Tired

If they do come out it will be great, though.

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contactcr
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You mean a XHP50,2 right? Innocent

JasonWW
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contactcr wrote:
You mean a XHP50,2 right? Innocent

Who? You lost me.

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HONDARIDER
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JasonWW wrote:
HONDARIDER wrote:
Love the idea of a 4000K or lower along with SMO reflector and possible ramping. Ramping is not a must but would be a great upgrade. I would buy one or two. Would really like to have the driver once developed with ramping to put in my other SP70’s.
Ramping is already designed in on the stock driver.

It is, I forgot. must have been thinking of something else. This day has been dragging on, my brain has slowed down I guess.

DB Custom
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Throw a rock at him Jason, make him behave…

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DB Custom wrote:
Lux-Perpetua, I notice that you like to use a decimal point in the tint descriptor… the problem with this is that the K is not for thousands but for Kelvin, so your 4.885K actually would mean less than 5 Kelvin and THAT would be atrocious! 4885K is an actual temperature of light that we would like to see, based on the Kelvin temperature scale. Wink

Thank you, that little detail was bugging me. Silly


A lot of Europe uses a punkt for a thousands separator and a komma for decimals – so natively to them, 4.885 is what we’d read as 4,885, and they’d say “3,0GHz CPU” when we’d choose 3.0.

I know it’s definitely the case in Germany Silly Ich spreche nur ein bisschen Deutsch.

DB Custom
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In which case you would have to identify thousands as K, and then Kelvin as a second K? So 4.485KK? You can’t assume the period point identifies thousands without the K (thousands) indicator, it leaves to much to the imagination and doesn’t clarify the exact 4885K color temperature. If you were talking 10.5K lumens then yes, that’s fine, but in this case it needs to be more clear.

DB Custom
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Ok, additive for the BLF Special edition SP70… I have changed the factory MOSFET to an Vishay-Dale SIR404DP and replaced the leads with 16ga Turnigy. With spring bypasses made by using 20ga Turnigy wires inside the dual springs and by using Samsung 30T 21700’s I am seeing a start value of 10,500 lumens and a 30 second reading of 8700 lumens. I am pretty sure a good AR coated lens would enable more lumens out the front, need to check without the lens to see what may be happening with this clear glass…

oweban
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Oh I agree that in this instance the comma separator should be dropped, more just a, that’s how they do things Smile

DB Custom
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Right, and I reckon we all pretty much know that… I tend to stumble on stuff like that because I take things literally, that fine line between black and white, right and wrong. I have never been good at reading between the lines. I got it, after looking at it a few times, so I guess everyone else will too.

If Lux Perpetua ever asks me to build him a light I’ll try to source 4.885 Kelvin emitters…. Big Smile

Edit: Oh NO! I get it now! I’ve been PUNKT! Facepalm

DB Custom
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This lights OP reflector measures 74.3mm opening diameter and 48.4mm deep. This depth to width ratio certainly needs some improvement if a mirror finished reflector is going to be implemented for the BLF light.

DB Custom
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Ok, I finally got a reading without the glass… the light with glass lens is making 10,500 lumens at start… without the glass it can do 11,220 lumens. so there is some 720 lumens being lost to the glass. I don’t think this is a huge deal and the glass is pretty good, I would like to see the 1.8mm thickness increase to 3mm though, at these diameters the glass can get broken easier so a thicker glass is warranted, or the use of a really good Acryclic with AR coating.

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oweban wrote:
I know it’s definitely the case in Germany Silly

You are right, but not only in germany :

Those british definitely were bad influences : imperial system, dot instead of a coma, etc. Big Smile

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Tally-ho wrote:
oweban wrote:
I know it’s definitely the case in Germany Silly

You are right, but not only in germany :

Those british definitely were bad influences : imperial system, dot instead of a coma, etc. Big Smile


Interesting! Well it looks like the British use the dot for decimal too Wink Great map though.

And wow that’s a hefty light! Agreed re: deeper reflector though if possible.

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Talking about the “good influence”, there’s only 19 days to go for Le Grand K before it is replaced by a measurement based on the Planck constant.

Funny enough, a brit (actually a Scot, Maxwell) was at the base of getting rid of all the artifacts and get the metric system really right.

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4492011 wrote:
Interested, in max throw with a fair amount of lumins so not a flat white, don't really like the throw from L6 and 70.2 looking at most of the throwers they are built around XHP 35 however they decide to get there.

You may wish to have a peek at a 21700, XHP35-HI thrower Sofirn has upcoming in another thread: Sofirn C8G

For multi-cell XHP35 HI lights, Astrolux MF02, Astrolux MF04, and BLF GT (also GT70, using XHP70.2). 

EDC Rotation: ZL SC62 | Jaxman E2L XP-G2 5A | Purple S2+ XPL-HI U6-3A | D4 w/ Luxeon V | RRT-01 
EagTac D25C Ti | DQG Slim AA Ti | UF-T1 by CRX | Olight S1 | Klarus Mini One Ti
L6 XHP70.2 P2 4000K FET+7135 | Jaxman M8 | MF02 | Jaxman Z1 CULNM1.TG | Blue S2+ w/ ML Special
In-progress: Supfire M6 3xXHP50.2 
Others: Nitecore EC23 | Nebo Twyst | Streamlight ProTac 1AA | TerraLux LightStar 100

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Tally-ho wrote:
oweban wrote:
I know it’s definitely the case in Germany Silly

You are right, but not only in germany :

Those british definitely were bad influences : imperial system, dot instead of a coma, etc. Big Smile

So how do they interpret whether 4,885 (four thousand eight hundred eighty-five), which is read as 4.885, is actually 4.885 (four and eight hundred eighty-five thousandths)?

488.555 would be even more confusing Sad

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Is having 1s or 2s battery configurations with extended tube like Convoy L2 is out of the question?

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Yes, out of the question.

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

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djozz wrote:
@Lux-perpetua: I like to follow this thread but you make it difficult by keeping editing the second and third post. Clicking the "new replies" always brings me to the edited 2nd and 3rd post, and after that I have to search manually for the first new posts in the thread. Editing the original post does not affect "new replies", moving the content of #2 and #3 to the OP makes it easier, clicking on the "new replies" then actually gets you to the new replies.

 

Sorry Jos, I was not aware of this issue. I moved everything from post #2 and #3 to the OP. Hopefully, this will resolve any future problems with new posts.

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DB Custom wrote:
Lux-Perpetua, I notice that you like to use a decimal point in the tint descriptor... the problem with this is that the K is not for thousands but for Kelvin, so your 4.885K actually would mean less than 5 Kelvin and THAT would be atrocious! 4885K is an actual temperature of light that we would like to see, based on the Kelvin temperature scale. Wink Thank you, that little detail was bugging me. :P

 

Sorry Dale, I didn’t expect to cause that much confusion when talking about CCT and Kelvin as the base unit. However, I do agree with you that using points and commas as decimal separator can sometimes be confusing. Wink

 

oweban wrote:
A lot of Europe uses a _punkt_ for a thousands separator and a _komma_ for decimals - so natively to them, 4.885 is what we’d read as 4,885, and they’d say “3,0GHz CPU” when we’d choose 3.0. I know it’s definitely the case in Germany Silly Ich spreche nur ein bisschen Deutsch.

 

That‘s exactly the root cause. I‘m used to separate the decimals by a point, not by a comma. That reminds me asking the cocky question what the internationally agreed standard is. Point or comma? Big Smile 

 

DB Custom wrote:
Right, and I reckon we all pretty much know that... I tend to stumble on stuff like that because I take things literally, that fine line between black and white, right and wrong. I have never been good at reading between the lines. I got it, after looking at it a few times, so I guess everyone else will too. If Lux Perpetua ever asks me to build him a light I'll try to source 4.885 Kelvin emitters.... Big Smile Edit: Oh NO! I get it now! I've been PUNKT! :FACEPALM:

 

Haha...I‘d love to get a DB Custom 'one of a kind' with 4,885...sorry, 4.885K. Silly

I just wonder if my eyes would even notice a CCT that low. Big Smile

Dale, from this day forward I promise to keep in mind using no decimal separator anymore. Result: No confusion for anyone. How’s that? Big Smile

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LOL, do what ya gotta do man, I’m stuck in the dark ages… will figure it all out sooner or later.

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Dale, you got quite some light for someone who‘s stuck in the dark ages. Big Smile

Cheers, Thomas 

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So is it possible this special edition may come out in 2019? seems like it’s still pretty early stages?

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I think it will come out in 2019 no matter it’s a SP70 BLF version or a compeletely new light if only you guys reach an agreement soon. Big Smile

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“retaining ring, smooth reflector, different tint, no switch tail cap, Anduril firmware”

This was Barry’s list from the other thread, it looks good to me.

Not sure how much time Toykeeper has available to get the configuration files right with the lantern and FW3A on the go.

Meanwhile the version of Narsil Tom E has in his MT07 is proven and probably perfect for this light.

Dale mentioned going to thicker glass to prevent cracking.

Is the plan to reshape the existing reflector and give it a smooth coating?

Maybe find an existing reflector and change the front of the head to match.

This looks interesting, wonder where Ban found it. http://kaidomain.com/Flashlight-DIY-and-Tools/Reflectors/S022485-86_2mm-D-x-84_7mm-H-SMO-Reflector

Not sure if Sofirn is willing to do that. I’d pay $10-$20 extra for thicker glass and a bigger reflector, would anyone else?

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Okay so are we thinking wider or deeper reflector? Both would require re-machining of the head piece of the body…

70.2 is just sticking with “wall of light”, right?

JasonWW
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I really don’t think Sofirn wants to make the head larger or longer.

The reflector is usually made for a specific head. It’s highly unlikely a different reflector would work in the SP70 head.

I think they want to stay with the 70.2, as well. A 50.2 would not handle the amps and it would be weaker.

I would not call the SP70 a flooded or wall of light nor a thrower. It’s like a general use light. A good mix of flood and throw.

I don’t think a sliced 70.2 is an option either for the reasons already listed.

So a different tint is the most likely change to the led.

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My 2 cents on this?

2 × 21700 with a 26×10 connector would be great, otherwise just stick to the 2 × 26650 version.
XHP 70.2 shaved (otherwise throw is garbage), still more then enough lumens output.
Clear reflector (again, throw)
SS bezel.
Thick coated glass lens
Good UI

And – PLEASE – NO glue, nowhere any kind of glue.

If glued: No God, NO!

Cheers,
Nico (Djozz’ neighbor)

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