Sofirn has a new low cost EDC 18650 light out with the SP31 Pro. It features an SST40 LED capable of 2000 lumens and available with 2 different tints and onboard USB-C charging for a very low price. Thanks to Sofirn for sending this to me and providing a discount to my viewers. I also have a SP31 Pro to giveaway so make sure you check out the description of this video and top comment on how to enter to win.
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Enter the Giveaway https://gleam.io/Xmkd9/sofirn-sc31-pro-5000k-kit-giveaway
Pickup the Sofirn SP31 Pro from Amazon. Don’t forget to click the Coupon code on the page for an additional discount too.
5000k Kit https://amzn.to/39JoSGf with Coupon DCNKLHS3
6500k Kit https://amzn.to/39yFJLC
Sofirn won’t win any packaging contests but for lights that are sold online I don’t really give any bonus points for spending more in this area. It’s functional, generic, and does the job. With the light you get a Sofrin branded 3000mAh battery (Light only options exist), USB-A to USB-C Cables, lanyard, and spare orings, button cover, and USB port cover as well as a decent manual.
The SC31 Pro has nothing I can find wrong with it, it’s a budget light but all the edges are chamfered anodizing is consistent, and markings are good. Starting at the tail, it’s slightly recessed but still tail stands well, non magnetic. The lanyard attachment point is on the tail as well. Internally you have a single spring and what looks like room for a magnet if you wish.
Threads are square cut and nicely greased. The body tube has one pocket clip area milled into it, but the tube is reversible so it could go on the front or back. There is standard diamond knurling and it’s about average grip.
The front of the light is removable. Internally it has a pretty stiff spring and it should work with all non proprietary 18650 batteries. Externally there is a silicone button thats fairly flush, the button has some texture to it to help you find it, and 2 LED underneath that work as a locator, and battery status indicator when charging. Minimal milling on the sides for heat dissipation. The USB-C Charging port on the rear has a rounded cover with a large flat. Mine fits pretty well and is out of the way. The head itself has a minimal bezel with no crenulations. There is a reflective coated glass lens, smooth reflector and LED centering is good.
Size and Weight
The SC31 Pro is very similar in size and dimensions to the popular Wurkkos FC11. And for good reason, Sofirn is the parent company to both companies. I measured the SC31 Pro at 115.7mm in length, minimum diameter at 24mm, maximum diameter at 26.5mm. Weight with the battery and clip was 110g or 3.88oz. It’s IPX7 water rated.
The SC31 comes with a basic lanyard that attaches at the tail cap if you want. The pocket clip is decent but not as deep carry as I would like with 22mm of the light sticking up out of your pocket. It is a friction fit clip but fairly tight. If only this was a deeper carry clip it would be even better.
LED & Beam
The LED that’s being used here is the Luminus SST-40 LED. It’s available in both Cool white (6500k) and Neutral white, and I have the latter here in 5000k. It surprised me a little as mine has a bit oa a rosy tint, it’s nice despite being only 70 CRI. It has a smaller hot center, with a medium amount of spill. There are some some kind of ugly outer edges in the beam with reflections off the edge of the reflector and bezel. Maximum output is rated at 2000 lumens and with the ramping modes you can adjust it to anything you wish. The light does have PWM but it’s minimal and only visible with my oscilloscope. This is expected since its running Andruil.
Heat and Runtime
One thing that I have started doing is comparing my lights running Andruil as they come from the factory and then after thermal calibration. While I firmly believe that lights should come calibrated from the factory the reality is for the money here they don’t and that’s a shame because it’s worth doing. ZeroAir has a good writeup on this in his reviews, and I followed that and the difference in my lights were impressive. Turbo runtime went from 1:50 when uncalibrated to 3:05 after calibration, with peak of that being right at 2 minutes. So if you get this or any Andruil light it’s worth going through the calibration procedure. Output was also roughly 13% better during most of the duration too. This does effect overall runtime going from 7:05:00 uncalibrated to FL1 to 4:05:00 when calibrated to FL1 but this is a trade off I am willing to take for more output and a less aggressive thermal restraint. Max temp I saw when calibrated was 41C but this is my own setting and was at the 7 min mark.
The Sofirn SP31 Pro here uses the Andriul firmware by Toykeeper. It’s standard Andruil but I did notice one difference at the top and bottom of the ramp I don’t get the blink like I do on say my FW3A, and most other Andruil lights. I like this. By default the light ships in ramping mode, there is a stepped mode too. Andruil is good but complex. It’s highly configurable (for example you can change the behavior of the backlight switch) so make sure to take some time to understand it fully.
The Sofirn SC31 Pro has onboard USB-C charging. It supports USB-C to C charging cables as well as USB-C PD in my tests. It’s great to see a budget light support this. Total charge time of the included 3000mAh 18650 battery from LVP at 2.780V to full at 4.145V was 2:30:00 with the maximum charging rate just at 1.88V. I have no complaints here, and it’s great to see at budget prices.
- My NW SST40 LED here in 5000k has a really nice tint with a rosy hue
- Fantastic value for a complete kit
- Andruil firmware is a love it or hate it thing, but it provides a lot of options for the enthusiast or budding flashaholic.
- The pocket clip here is a small letdown, it’s not as deep carry as I would have hoped.
- Non magnetic tail, although easy to modify to make magnetic.
- Edges of the beam are a little ugly.
I am not ready to call this the Wurkkos FC11 killer since it’s an extremely similar light made by the same parent company but what I will call it is an extremely good value for a slightly more advanced light because it has Andruil UI. While I love the LH351D in my FC11 the tint here in the SC31 Pro is better in my opinion, slightly brighter, but you do lose the high CRI of the LH351D.
The Andruil UI is complex, and that may be a turn off for some new to the hobby, but for a noob there is muggle mode. Take some time and study the diagram to understand how it works and I think you will enjoy it. Build quality here is appropriate for the price, nothing is bad but it’s also not class leading. This is a great all around light for the money here and I have no hesitation recommending it, especially at the price Sofrin has offered to my viewers with the discount you can find in the description. About $25 at the time of filming.
Enter the Giveaway for the Sofirn SP31 Pro Kit (5000k) https://gleam.io/Xmkd9/sofirn-sp31-pro-5000k-kit-giveaway