【ツ】Sofirn SP35 Sales Thread - available on Sofirnlight + AliExpress

58 posts / 0 new
Last post

Pages

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam
【ツ】Sofirn SP35 Sales Thread - available on Sofirnlight + AliExpress

Hello everyone,

As some of you may have noticed already, Sofirn has just launched their new SP35 flashlight. They have kept the successful "cigar-design" of SP32A V2, boosted it up to 21700 size, included the powerful and reliable Luminus SST40 LED and - most pleasing - added constant current regulation with a buck driver for steady output. Moreover, they added USB-C charging and a new bidirectional clip.

 

 

 

For flashoholics who prefer to have full manual control of stepping down, Sofirn is now offering their first batch without ATR, i.e. without thermal regulation.

What's important to know?

  • Turbo and High mode will not step down, i.e. the flashlight will run on full power as long as the battery can deliver enough power.
  • Without any interaction on turbo mode, the flashlight will get significantly hot with temperatures of 80°C or above!
  • Under any circumstances, never let this flashlight run unattended!
  • Never let children play with this flashlight!
  • Use turbo and high mode with common sense and manually step down once the light gets too hot in your hands.

Specifications

❖ Emitter: 1x Luminus SST-40 with a lifespan of 50,000 hours

❖ Reflector: Smooth (SMO) reflector

❖ Operating voltage: 3.0V –4.2V

❖ Driver: Constant current buck driver

❖ Battery options: 1x21700 rechargeable lithium-ion battery

❖ Dimension: 126mm (length) × 28mm (head diameter)

❖ Weight: 73grams (without battery)

❖ Flashlight body: Aerospace grade 6061 grade aluminum alloy, CNC manufactured to hard-anodized to military grade specification type III, anti-abrasive finish to get solid built body, anti-crash geometry and better heat exchange.

❖ Toughened mineral glass lenswith purple AR coating

❖ Water resistance i.a.w. IPX-8 (up to 2 meter under water, not for diving)

❖ Mode Memory: memorizes the last brightness level used in the general modes (except Strobe)

❖ Reverse polarity protection from improper battery installation

❖ Low voltage warning

❖ Low voltage protection

 

User Manual

Please click ► HERE ◄ to download the user manual in English.

Please click ► HERE ◄ to download the user manual in German.

Important notice: Please be informed that this updated manual refers to the SP35 without ATR. This version does not have any thermal stepdown!

 

Reviews

Youtube:

https://youtu.be/Q9K4OkFs9Qk

BLF:

The technical discussion thread

 

BLF Promotion Prices

 

[Sofirnlight Webshop]: as of $ 29.99 ➥ 15% off

Please order here: https://www.sofirnlight.com/sofirn-sp35-max-2000-lumen-no-stepdown-version-with-buck-driver-works-with-your-typec-charger-p0165.html

Please use code: WND9F7HE

Available w/o battery or with a 4.000mAh or new 5.000mAh battery

 

[AliExpress]: as of $ 29.99 ➥ 15% off

Please order here: https://www.aliexpress.com/item/1005001640015568.html

Please use code: KDFOAJWQOAV8

Available w/o battery or with battery

Edited by: Lux-Perpetua on 02/18/2021 - 03:54
Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

[reserved]

Muto
Offline
Last seen: 2 hours 58 min ago
Joined: 09/04/2012 - 16:42
Posts: 2562
Location: Southeast, PA

Thanks for code and info!

“History doesn’t repeat itself, but it sometimes rhymes,” Mark Twain

After the Apocalypse there will be only 2 things left alive, Cockroaches and Keith Richards

pennzy
pennzy's picture
Offline
Last seen: 4 hours 54 min ago
Joined: 12/10/2017 - 19:45
Posts: 2909
Location: United States , Pa.

I don’t mind ATR as long as it doesn’t kick in too soon. I don’t care for timed step downs when a light already has ATR. The SD 05 is perfect since removing 3 min. step down. Wish you would remove it from the 31 and 32.

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

Important update:

Dear members,

I am sorry to inform you about a glitch in Sofirn‘s original discount calculation. Some orders were carried out using a wrong discount, higher than those advertised 15%. These orders are being cancelled and refunded by Sofirn. If your order was cancelled, I kindly ask you to place your order once again, using the updated code in the opening post. Sorry for the inconvenience.

Thank you so much for your understanding.

Thomas 

d_t_a
Offline
Last seen: 28 min 18 sec ago
Joined: 08/04/2017 - 23:58
Posts: 2268
Location: Manila, Philippines

Just curious, was there a change from the original first batch of Sofirn SP35 with this new “buck driver” design? Or is the first original batch of SP35 also have the “buck driver” design?

I ordered the SP35 during the 11.11 AliExpress sale, but due to long shipping times these days, my order is still in transit… (I expect at least another month before I can receive my SP35 unit from the 11.11 AE sale). So was wondering if that already has the buck driver or not.

Is there a quick way to check or test if the SP35 unit is the “without stepdown version” (other than doing a longer ceiling-bounce runtime test)?

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

The first batch of SP35 uses the new buckdriver but comes without thermal regulation. It doesn’t matter if you purchased from AliExpress or from sofirnlight.com. Do you have an IR thermometer you can point at the light when it heats up? In normal ambient conditions and without any thermal regulation in place the outer structure should heat up beyond 55°C after 2-3 minutes on turbo.

Maybe it’s not a bad idea to wear some gloves before starting the penetration test. LOL

d_t_a
Offline
Last seen: 28 min 18 sec ago
Joined: 08/04/2017 - 23:58
Posts: 2268
Location: Manila, Philippines

Thanks for the info Lux-Perpetua.

I checked Sofirnlight.com which offers the SP35 with “No Stepdown” variant.

The listing for SP35 in AE doesn’t seem to indicate “No Stepdown” though.

Both item description do indicate the SP35 uses a buck driver.

How do we know which one is the No Stepdown version (is it only the Sofirnlight.com variant) if ordering the SP35 now?
(I’d like to try out both versions – the No Stepdown and with Thermal Stepdown variant ; I assume my first order 11.11 from AE is the No Stepdown version, if I want to order a new variant with ATR, any idea which one is the ATR variant? Or is that still to be produced in new batches?)

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

AFAIK, there is only the „no stepdown version“ with 800 pcs in total batch quantity available. I am not sure if Sofirn wants to wait until batch one is sold out. However, I highly recommend Sofirn to physically and logistically separate the next batch with ATR from the first version without ATR.

lite624
Offline
Last seen: 2 days 21 hours ago
Joined: 06/30/2020 - 12:02
Posts: 10

I feel that without ATR its kinda dangerous if its a new flashlight user / beginner using it. I would be interested to get one with ATR

id30209
id30209's picture
Offline
Last seen: 9 hours 49 min ago
Joined: 05/17/2018 - 12:20
Posts: 1670
Location: Croatia

Lux, i tried coupon code on Sofirn webpage but it says it’s expired.

WTB Titanium 4sevens 2xAA tube

djozz
djozz's picture
Offline
Last seen: 8 hours 14 min ago
Joined: 09/07/2012 - 17:04
Posts: 17536
Location: Amsterdam

lite624 wrote:
I feel that without ATR its kinda dangerous if its a new flashlight user / beginner using it. I would be interested to get one with ATR

No, not really dangerous, it heats up to close to 100 degrees Celsius and the temperature stays there. Way too hot to hold, not good for the lifetime of the flashlight, but nothing will fail.
d_t_a
Offline
Last seen: 28 min 18 sec ago
Joined: 08/04/2017 - 23:58
Posts: 2268
Location: Manila, Philippines
djozz wrote:
lite624 wrote:
I feel that without ATR its kinda dangerous if its a new flashlight user / beginner using it. I would be interested to get one with ATR
No, not really dangerous, it heats up to close to 100 degrees Celsius and the temperature stays there. Way too hot to hold, not good for the lifetime of the flashlight, but nothing will fail.

Can it be used to burn paper? Wink

(sometimes people in our local flashlight community ask if I know of which (not too big, preferably EDC size or just a bit bigger) flashlight that can be used to “light up a fire” (make a piece of paper burn).. to which I usually just mention that higher-lumens flashlights usually can get hot enough to burn paper, but it’s not a “given” that burning will always happen — well I haven’t really tested that it does, but have noted some videos online that manage to use bright flashlights to produce a fire on paper..

~~~~~~

Anyway with that side comment aside, how much estimated “lifetime” of the flashlight may be affected when it’s accidentally set to Turbo and the SP35 is left that way once or twice?

djozz
djozz's picture
Offline
Last seen: 8 hours 14 min ago
Joined: 09/07/2012 - 17:04
Posts: 17536
Location: Amsterdam

Quote:
Anyway with that side comment aside, how much estimated “lifetime” of the flashlight may be affected when it’s accidentally set to Turbo and the SP35 is left that way once or twice?

Once or twice or 10 times should be fine I guess, all the components inside a flashlight can survive 150 degrees, even the battery, although for the battery 150 degrees is close to failure.

But that is theory, in practice we flashoholics would be the least likely people to know how long a flashlight lasts. At least in my case: I have (way too) many flashlights but each of them gets minimal use, how would I know how they fare over time? Facepalm

I have a Yootoo SD1 (modded with a LH351D) that I use as bicycle lamp, in winter it gets 5 hours of use every week. It is one of the least exciting flashlights in my collection but I do know that it works well and keeps working well. Same for the BLF-A6 that was my previous bicycle lamp.

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

A TLF member measured 103°C / 217°F after 15min runtime on turbo.

https://www.taschenlampen-forum.de/threads/sofirn-sp35.78231/page-4#post-1107360

djozz wrote:
lite624 wrote:
I feel that without ATR its kinda dangerous if its a new flashlight user / beginner using it. I would be interested to get one with ATR
No, not really dangerous, it heats up to close to 100 degrees Celsius and the temperature stays there. Way too hot to hold, not good for the lifetime of the flashlight, but nothing will fail.

Well, this kind of statement is in my humble opinion quite dangerous to leave uncommented. Depending on ambient temperature, battery age/condition/internal resistance and where you actually put the flashlight this can lead to a quite hazardous situation. Most (if not all) lithium-ion batteries are specificied to a much lower maximum temperature, especially in environments without temperature control. Normal operational surface temperature may be up to 60°C, in controlled environments up to 80°C i.a.w. specs from the manufacturer. It is unforeseeable what happens if a lthium-ion battery is exposed to more than 100°C for quite some time. Most likely, nothing will happen if you do this one or two times for a short period of time but I strongly disagree to say "nothing will fail". If things go south, you have a pipe bomb on your desk or worse, in your hands.

I can only emphasize again that this flashlight needs to be operated with common sense, i.e. once it gets way too hot to hold it's reasonable to step down its power manually.

djozz
djozz's picture
Offline
Last seen: 8 hours 14 min ago
Joined: 09/07/2012 - 17:04
Posts: 17536
Location: Amsterdam

There is a large gap between normal operating temperature limits and the temperature at which Li-ion cells are actually failing. From what I recall, the temperature at which thermal runaway is becoming a risk is for classic li-ion cells about 150 degrees (not unforseeable, it is tested), for IMR-cells and more modern chemistries a bit higher. This discussion is not about normal operation (you do not normally operate a flashlight at 100degC, that burns your hand badly) but a calamity, in which case you want to know when things really go wrong instead of the common recommendations.

Btw, I think that, if done well, thermal regulation is a good thing, although some manufacturer’s setting are so conservative that it spoils the functionality of the flashlight. But this discussion was: is it dangerous not having it on this light? And my estimation is that it is inconvenient but not dangerous.

id30209
id30209's picture
Offline
Last seen: 9 hours 49 min ago
Joined: 05/17/2018 - 12:20
Posts: 1670
Location: Croatia

id30209 wrote:

Lux, i tried coupon code on Sofirn webpage but it says it’s expired.

 

 

...

WTB Titanium 4sevens 2xAA tube

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

I try to get us a new coupon code.

id30209
id30209's picture
Offline
Last seen: 9 hours 49 min ago
Joined: 05/17/2018 - 12:20
Posts: 1670
Location: Croatia

Lux-Perpetua wrote:

I try to get us a new coupon code.

 

Sorted! Code works great, only i was dumb not to see it was applied and order went to awaiting payment section of my account.

Sorry for the trouble.

WTB Titanium 4sevens 2xAA tube

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

Update (OP is updated, too):

As Sofirn ships the current version of the SP35 without ATR with the manual of the SP35 with ATR, I took the liberty to revise the manual accordingly and offer it for download here:

Please click ► HERE ◄ to download the revised user manual in English.

Please click ► HERE ◄ to download the revised user manual in German.

Important notice: Please be informed that this updated manual refers to the SP35 without ATR. This version does not have any thermal stepdown!

pennzy
pennzy's picture
Offline
Last seen: 4 hours 54 min ago
Joined: 12/10/2017 - 19:45
Posts: 2909
Location: United States , Pa.

Any idea if this will be coming out with a 50.2?

Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

Very unlikely to happen in the new future. Sofirn is currently struggling to get ahold of the 3V XHP50.2. I wish there was a 3V XHP70.2 or MT-G2 to run with SP35. 

tantrik77
Offline
Last seen: 2 days 2 hours ago
Joined: 03/30/2017 - 05:41
Posts: 81
Location: United States

Is this 6500k or 5000k? Why is it saying Sofirn can’t ship batteries to the US? I just bought some batteries a little over a week ago. What’s the deal?

pennzy
pennzy's picture
Offline
Last seen: 4 hours 54 min ago
Joined: 12/10/2017 - 19:45
Posts: 2909
Location: United States , Pa.

Lux-Perpetua wrote:

Very unlikely to happen in the new future. Sofirn is currently struggling to get ahold of the 3V XHP50.2. I wish there was a 3V XHP70.2 or MT-G2 to run with SP35. 


I have trouble telling from beam shots if the SST 40 has a smooth beam or a distinct hot spot. I am not a fan of distracting hot spots for walking. Can you tell me your opinion please?
Lux-Perpetua
Offline
Last seen: 20 hours 8 min ago
Joined: 03/01/2018 - 04:39
Posts: 2759
Location: at the end of the light beam

tantrik77 wrote:
Is this 6500k or 5000k? Why is it saying Sofirn can't ship batteries to the US? I just bought some batteries a little over a week ago. What's the deal?

AFAIK, it’s 6000-6500K. IIRC, they are still selling the first batch that comes without ATR.

Shipping single batteries has become a real problem for many logistics service providers, at least for air freight. For air transport these batteries are considered as dangerous goods. Legal restrictions are much stricter now, so there are few companies left and they probably charge a leg and an arm for shipping lithium ion batteries. It is easier to ship batteries while they are inserted in a flashlight.

pennzy wrote:
I have trouble telling from beam shots if the SST 40 has a smooth beam or a distinct hot spot. I am not a fan of distracting hot spots for walking. Can you tell me your opinion please?

I am not sure if this answers your question but I don’t mind to have a throwy light with a hot spot in the beam while taking a walk. It depends on the user’s preference and the environment. If I had to walk along a convoluted foodpath and if it was misty outside, I would rather pick a floody flashlight or headlamp to only light up the area in front of my feet. I have made good experiences in using a floody headlamp around my neck and a handheld flashlight for medium/large distances.

Concerning SP35 in particular, I cannot tell you my opinion yet as I do not have a sample of it.

gchart
gchart's picture
Offline
Last seen: 7 hours 19 min ago
Joined: 03/19/2016 - 11:57
Posts: 2877
Location: Central IL

pennzy wrote:
I have trouble telling from beam shots if the SST 40 has a smooth beam or a distinct hot spot. I am not a fan of distracting hot spots for walking. Can you tell me your opinion please?

Very smooth beams usually come from TIR while reflectors usually have some sort of hotspot. If you want to get away from a hotspot, you probably want a light with a TIR.

You commented right after I posted beamshots in my review of the SP35 so I figure you’ve seen those, right? I feel like it shows a pretty distinct hotspot.

gchart wrote:

Note: if there is any coloration in the beam, take it with a grain of salt. I’m colorblind and can’t confirm if the tint matches reality.

Beamshot 1: ~18 inches away (~46cm) using Low mode, ISO 80, 1/200 second exposure, 6000K white balance

Beamshot 2: ~8 feet away (~244cm) using Low mode, ISO 80, 1/50 second exposure, 5000K white balance

pennzy
pennzy's picture
Offline
Last seen: 4 hours 54 min ago
Joined: 12/10/2017 - 19:45
Posts: 2909
Location: United States , Pa.

gchart wrote:
pennzy wrote:
I have trouble telling from beam shots if the SST 40 has a smooth beam or a distinct hot spot. I am not a fan of distracting hot spots for walking. Can you tell me your opinion please?

Very smooth beams usually come from TIR while reflectors usually have some sort of hotspot. If you want to get away from a hotspot, you probably want a light with a TIR.

You commented right after I posted beamshots in my review of the SP35 so I figure you’ve seen those, right? I feel like it shows a pretty distinct hotspot.

gchart wrote:

Note: if there is any coloration in the beam, take it with a grain of salt. I’m colorblind and can’t confirm if the tint matches reality.

Beamshot 1: ~18 inches away (~46cm) using Low mode, ISO 80, 1/200 second exposure, 6000K white balance

Beamshot 2: ~8 feet away (~244cm) using Low mode, ISO 80, 1/50 second exposure, 5000K white balance


Thanks.
mbp
Offline
Last seen: 2 hours 40 min ago
Joined: 04/01/2019 - 11:00
Posts: 306
Location: Baltimore, MD

Sofirn should consider offering this light with LH351D, although I suppose that creates competition within the product line. I am not interested in low-CRI EDC lights, but I would buy an LH351D version.

gchart
gchart's picture
Offline
Last seen: 7 hours 19 min ago
Joined: 03/19/2016 - 11:57
Posts: 2877
Location: Central IL

mbp wrote:
Sofirn should consider offering this light with LH351D, although I suppose that creates competition within the product line. I am not interested in low-CRI EDC lights, but I would buy an LH351D version.

I originally considered swapping a LH351D into mine, but decided not too. Pushing a LH351D at 6 amps is past it’s peak and well past it’s sweet spot.

https://budgetlightforum.com/comment/1355892#comment-1355892

It probably won’t be anything revolutionary, but I ordered some 3V XHP50.2 to try in my SP35. I’m curious in the impact on raw output (lumens) and to see if it runs any cooler in Turbo (depends on how the vF compares vs the SST40). We’ll see. I know the beam will be ugly but I can’t help playing around.

d_t_a
Offline
Last seen: 28 min 18 sec ago
Joined: 08/04/2017 - 23:58
Posts: 2268
Location: Manila, Philippines

Just curious, what is a safe sustained max current for an LH351D (assuming somewhat properly cooled)?

I tested tailcap current of SP35 (with a nearly full charged battery), and getting around 5 Amps max current consumption on Turbo mode (using a UT210E clamp meter), with a nearly full-charged 21700 battery. (although I’m not sure if the power consumption will vary depending on battery voltage for the SP35 — since it uses a buck driver.)

mbp
Offline
Last seen: 2 hours 40 min ago
Joined: 04/01/2019 - 11:00
Posts: 306
Location: Baltimore, MD

d_t_a wrote:
Just curious, what is a safe sustained max current for an LH351D (assuming somewhat properly cooled)?

I tested tailcap current of SP35 (with a nearly full charged battery), and getting around 5 Amps max current consumption on Turbo mode (using a UT210E clamp meter), with a nearly full-charged 21700 battery. (although I’m not sure if the power consumption will vary depending on battery voltage for the SP35 — since it uses a buck driver.)

I believe around 5 amps, that is where Wurkkos’ FET powered LH351D lights max out also.

Pages