Sofirn has made an upgrade to their SP33 light after taking feedback from the flashlight community and come out with the SP33 V3 edition. It can use a several sizes of batteries such as a 26650, 18650, and even 21700’s. It features a Cree XHP50.2 at 3V LED and produces 3500 lumens in a pretty compact light and a very budget friendly price. Thanks to Sofirn for sending this to me to check out.
Sofirn is offering 36% off the SP33 V3 that’s available from Amazon by using the coupon LiquidRetro combine that with the click off coupon to save a total of 36% brining this to $32.24 before tax. Get it at https://amzn.to/32M5SoH
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Packaging & Accessories
The SP33 has a bit of a more retail looking box then we have seen from them in the past. It’s a black and orange hanger box but it doesn’t have a photo of the light on it, just a night shot showing a very bright flashlight. Accessories that are included with the SP33 V3 Kit are The 5500mAh 26650 battery, 18650 battery adapter tube, USB-A to C charging cable, manual, and a lanyard with a couple extra o’rings.
Construction
The SP33 V3 is made of 6061 aluminum and hard anodized in black. Machining is good for the price range, with no major concerns. Starting at the tail cap, it has a crown and one side has 2 holes for a lanyard attachment point. They are just a little to small to easily fit paracord in, but you might be able to if you are patient and creative. Knurling is straight and there are a few flats in place for style. This is different from the rest of the light but provide function. Inside there is a single short fairly stiff spring that provides compatibility with the many different battery types this light supports. Threads are ACME cut and were dry in my example.
The body tube is reversible and has a decently thick walls. There isn’t a place for a clip but that’s ok for a light of this diameter in my opinion. The knurling is standard diamond knurling and is done in four panels around the light and is of medium texture.
The head is a solid piece. In the center you have the flat plastic e-switch button with an LED in the middle used for power indication. Around the hexagon there are small areas milled in to help with cooling and give style. Opposite the button is the USB-C port for recharging. The silicon cover here is a bit large and does protrude slightly from the lights back, enough so it won’t sit flat on this port but in the hand this works fine and stays out of the way.
The V3 features a deeper stainless steel bezel with a few short but long crenelations. This has been lengthened on the V3 version. The lens looks to be uncoated mineral glass and is fairly thick. The reflector underneath is deep with an orange peel.
Size & Weight
I measured the length of the light at 126mm, maximum diameter at 37.5mm, minimum diameter at 32mm. Weight with the included battery is 229g.
I don’t have a lot of other great 26650 lights that are similar sized to compare it to. What I do have is the Wowtac A4 V2 I reviewed recently. It’s similar in length and diameter but the head is much larger. I also have the Sofirn SP36 I reviewed last year, its similar in length but has more diameter due to it’s 3 18650 batteries.
Retention
Not much to say on retention here, there isn’t a place for a clip on the light, and it doesn’t come with a holster. The tail cap does have a place for a lanyard to attach if you wish. The light does tail stand without an issue.
LED & Beam Shots
V3 of this light is using a Cree XHP50.2 LED at 3V instead of the 6V version of this led. Tint is listed at between 6000-6500k, so cool white. On lower powers I do notice a bit of green tint shift on my example but it’s minimal. On higher powers you do notice tint shift across the beam. I would categorize the light as an all purpose beam, It’s fairly wide and the hotspot is so broad it’s not a thrower, yet it goes a good distance as you can see in my night shots. Sofirn quotes a throw of 275 meters and I think that’s a good number that’s in the ballpark.
V3 is using a FET driver instead of boost driver meaning it’s drawing more current from the battery thus the higher turbo output that’s seen here. You are going to want to use a good high quality high drain flat top battery with this light for maximum performance. It can accept 26650’s of all types, 18650’s of all types with the included spacer, or unprotected flat top 21700 batteries. The light has PWM on all modes according to my scope and solar cell setup. That said it’s pretty fast and my eyes or camera don’t notice it.
Output is listed as:
- Turbo 3500 Lumens
- High 1600 Lumens
- Medium 450 Lumens
- Low 150 Lumens
- Moon 1 Lumen
Heat and Runtime
The SP33 V3 features Advanced temperature regulation without timed step downs, instead output will decline with the drivers internals reach 55C. Brightness will increase again when temps decrease, and we can see this in the runtime graph, as it’s a very seesaw motion. On average you’re seeing maybe a 20% swing in relative output over the life of the battery after the initial turbo step down. I didn’t notice it unless I was really focused on it on a 25 minute walk with the light. Turbo did start stepping down due to heat at 1 min 45 seconds, taking a little over a minute to step down to 18% relative output to cool. From here you can see on the graph it went up and down in terms of output as the flashlight regulated its own heat.
Total runtime on the included 5500mAh battery was 3:24:00. FL1 was at 3:11:00 and the maximum temp I saw during my runtime on the exterior was 48C or 118F so definitely very warm. All temps were taken at my ambient room temp of about 25C.
User Interface
This light has 2 UI modes, default mode (mode 1) is a stepped mode that works logically. It has moonlight, low, medium, and high modes with memory and Turbo without. A single click turns the light on from off, and holding the button down cycles through modes. Long press when off turns on Moonlight mode and double click goes to Turbo. Triple click to go to SOS/blinking modes.
The second UI mode is a ramping mode. To switch between the 2 modes when the light is on do a quick quad press. Ramping is like many other ramping modes with a flash on both the top and bottom end. For me while I like being able to set brightness exactly where I want it, I don’t love the speed of the ramp here, it’s a little on the slow side.
There is an electronic lockout when the light is off just quad click quickly. You can also mechanically lock it out with a slight twist of the tail or body tube. This is useful for such a powerful light os you don’t burn a hole in a bag or coat.
Recharging
The light isn’t picky on the size of batteries used in the light diameter or size wise. It can accept 26650’s of all types, 18650’s of all types with the included spacer, or unprotected flat top 21700 batteries. The later having the most slop in the tube due to not including an appropriately sized spacer. I used the supplied 5500mAh Sofirn 26650 battery for my charging tests. LVP came in on the light at 2.895V, so a little lower then I prefer but acceptable. The battery measured as fully charged at 4.15V.
The light does use USB-C for recharging which is nice to see. However it requires a USB-A to C cable (Supplied) to charge, and isn’t compatible with a C-C cable. When charging the small LED in the center of the button blinks red, and goes blue when charged. From LVP to full the light took 3 hours, 30 minutes. Maximum charging rate was 1.7A.
Pro’s
- Great budget friendly price for a lot of light in a good overall package.
- Is available in a few different versions, and battery options.
- UI is more “beginner friendly” than Anduril firmware.
Con’s
- Still not fully utilizing USB-C to C, requires a USB-A to USB-C cable to recharge.
- Very active thermal controls, with a good amount of change in output.
- No Neutral White tint option.
Conclusion
The Sofirn SP33 V3 is a low cost light with a lot of Output. Sofirn lists the light as making 3500 lumens. It runs on 26650, 18650 and some 21700 batteries so it’s widely compatible with the 3 most popular battery sizes today.
It has features not usually found in this price category like USB-C charging (not compatible with USB-C PD (C-C) charging), active thermal controls, and a stainless steel bezel. The active Thermal controls are pretty reactive but they are smooth and I don’t notice it with my eye as much as the graph shows. I wish it was more widely available in Neutral white, they list it as an available option on their AliExpress store but I don’t see these available from other retailers.
For the money especially with the discount Sofirn has provided makes this a really great value for the complete kit. It fits well in my hand and produces a ton of light. I can easily recommend this as a great high output budget light to pick up.
Sofirn is offering 36% off the SP33 V3 that’s available from Amazon by using the coupon LiquidRetro combine that with the click off coupon to save a total of 36% brining this to $32.24 before tax. Get it at https://amzn.to/32M5SoH