Sofirn LT1s Review

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TimMc
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Sofirn LT1s Review

Sofirn kindly sent an LT1s.

Here’s my review:
https://timmcmahon.com.au/posts/sofirn_lt1s/

raccoon city
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Top notch review!

Looks like an extremely nice lantern.

river345
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Nice review and pictures. I was kinda confused how the battery goes in. So…it’s inside the lantern part?

BlueSwordM
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Wait, wait.

The LT1S uses a buck driver?

That actually makes it a lot more efficient at low power than the LT1…

Also, add this to your 21700 paragraph:

“The included cell seems to be the Lishen 5000mAh 21700 LR2710SD.”

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

raccoon city
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On the bottom, there is an opening in the center where you put the battery in.

The battery will be vertical if the lantern is vertical.

will34
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Nice review, thanks!

Quote:
The LT1s will step down when it reaches the thresholds: 45 C, 55 C and 65 C.

Is this configurable?

SammysHP
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Great review, thank you!

The left battery with the three lines should be a Sanyo NCR21700A and the right one with the ring a Lishen LR2170SD.

scintillator
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Thank you for the excellent review.I have this lantern and I am enjoying it more now that I see the specs.
I would like it more if it had a magnetic base.

TimMc
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river345 wrote:
Nice review and pictures. I was kinda confused how the battery goes in. So…it’s inside the lantern part?

Yes, the 21700 battery is inserted into the base like flashlights with a tailcap.

BlueSwordM wrote:
Wait, wait.

The LT1S uses a buck driver?

That’s what Sofirn say but I haven’t done a teardown. Reviewing the driver components is a bit beyond my skillset at the moment. Facepalm

will34 wrote:
Nice review, thanks!
Quote:
The LT1s will step down when it reaches the thresholds: 45 C, 55 C and 65 C.

Is this configurable?

The thresholds don’t appear to be configurable.

SammysHP wrote:
Great review, thank you!

The left battery with the three lines should be a Sanyo NCR21700A and the right one with the ring a Lishen LR2170SD.

Thanks! It sounds like they may be similar.

TIFisher
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Your reviews are superb, Tim. The intro picture really puts the size of this light in perspective (much smaller than I envisioned…that or your hand size rivals Andre the Giant). A good sale on this and I’m in.

TimMc
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TIFisher wrote:
Your reviews are superb, Tim. The intro picture really puts the size of this light in perspective (much smaller than I envisioned…that or your hand size rivals Andre the Giant). A good sale on this and I’m in.

Thanks! My hands aren’t too big Beer

Hopefully the comparison photo gives a good indication of scale too. It’s about the same size as the BLF LT1 head. Big Smile

RobertB
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Nice review. I have to get one. Red light for camping (no bugs), the way the original LT1 should have been in the first place

TimMc
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Driver photos from Sofirn:

Stefano
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Thanks for review.
How is the button quality of this lantern?
Do you think it is durable?

TimMc
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Stefano wrote:
Thanks for review. How is the button quality of this lantern? Do you think it is durable?

The button cover seems durable. The button doesn’t feel pointy so I expect the button cover to last years.

The button doesn’t feel like it will break. It has a satisfying click but it activates slightly sooner than the button of an LT1.

Stefano
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@TimMc Thanks
I have one of these lanterns on the way.
I already have many Fenix lanterns but it convinced me to buy 2700K tint and strong red light.

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Great review.
This one is now on my list. Soon as Sofirn puts them on a deal at Amazon – I’m on it.
The form factor of several cheap lanterns but with Sofirn build quality and a 21700 down the center.
Other than a tripod socket – don’t think I’d want anything else.
Nice to the the turbo and high hold at a constant value across the runtime.
All the Best,
Jeff

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And…
It’ 15% off at Amazon with the Amazon coupon.
All the Best,
Jeff
https://www.amazon.com/gp/product/B09TB1NFWF/ref=ppx_yo_dt_b_asin_title_...

jeff51
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The LT1s showed up yesterday from Amazon.
I must say it’s a winner.
Love the form factor. Easy interface.
Way more compact and lighter than the LT1. I can live without all the blinkies.
The ability to light half the LEDs for a more directional light is a brilliant idea.
I don’t see any PWM, but I will put it to the scope at some point.

The battery came at 3.47v. It tested 4987mAh on the first go round.
An 18650 flat top works just fine without any adapter.
Came with extra O rings. Threads well greased out of the box.

Moon mode seems way brighter than the claimed 1 Lumen.
The Red is way bright.

Wish moon was a lower level or perhaps just had a extra firefly mode.
And a timed go to sleep mode would be icing on the cake.

It’s a keeper. This would make a great gift for muggles or any enthusiast.
All the Best,
Jeff

Stefano
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My lantern arrived today.
The battery was 3.45 volts.
A beautiful lantern, well made and I’m happy with it.
I found 2700K light as default, the red light is very strong and it meets my needs.
When I pulled out the charging cable, I must have also taken the protective grommet in my hand and it came out.
It was impossible to reinsert it, with a Victorinox I cut a small piece of the rubber pin to make it retract, perhaps I would have liked a better fixing system.
I still don’t understand how to switch from warm light to cold light but I admit that I still haven’t read the instructions well.

If it also had a lower light like the Fenix CL26R it could be the perfect lantern.

Stefano
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I read the review and the manual well and figured out how to switch from warm to cold 6500K mode, it’s quite easy.

I did not understand, however, if there are only two tint (2700 K and 6500 K) or if there are 4 tint between 2700 and 6500K as we are talking about “tint ramp” (but it seems so)

TimMc
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While the LT1s is on, click the button, release, and then quickly press and hold to ramp the tint up or down.

TacGriz describes it as 2H (like the notation used for Anduril):
https://tgreviews.com/2022/03/15/grizzlys-sofirn-lt1s-review-better-than...

I think half the 36 CSP1919 LEDs are 2700K and half are 6500K. The diffuser might be bringing the CCT down to 2500K and 5600K.

While shifting the tint, 2700K LEDs may increase in light output while 6500K LEDs decrease. Or it may do the opposite when changing direction.

You end up with much more than 4 tints. The colour temperature changes smoothly. I used an Opple Light Master Pro III to measure the CCT while trying to change the CCT to 5000K. It doesn’t jump from 2700K to 3000K to 3500K to 4000K etc. It ramps up smoothly with many more CCTs in between.

Stefano
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Thanks for the explanations.

I am using the warm tint, very happy to have bought this lantern, it is fantastic.