Sofirn/EDC

Sofirn SP35

Name: Sofirn SP35
Brand: Sofirn
Price: 28 USD
Availability: Discontinued

DiscontinuedSofirn no longer makes this light; what dealers have left is the last of it. See Sofirn’s current lights.

The SP35 was Sofirn's 21700 workhorse: high output and USB-C charging at a budget price, with a simpler interface than Anduril. Buyers who wanted lumens without learning enthusiast firmware were its main audience.

Beam profile

Balanced, about 21° wide. A usable hotspot with enough spill to see around it.

Estimated from 2,000 lm ÷ 19,000 cd — how this works

$28

Specifications

Output: 2000lm
Peak intensity: 19000cd
Beam distance: 276m
Emitter: SST-40 6500K
Colour rendering: 70 CRI
Beam type: Balanced
Cell: 21700
Runtime: 2 hrs (high)
Modes: 5 Stepped
Interface: Simple
Water/dust: IPX8
Dimensions: 5.1 x 1.1 in
Weight: 3.5 oz
Warranty: 1 Year

Manufacturer figures, measured to ANSI FL1 where the brand states it.

Features

USB-C Charging Pocket Clip Waterproof (IP67+)

What owners report

Sofirn SP35/3 sources reviewed

The SP35 is a plain, well-made 21700 light that does the obvious things right: an SST-40 behind a smooth reflector for a defined hotspot and real throw, USB-C charging that actually pulls around 2A, and build quality reviewers say would be reasonable even at a higher price.

It isn't a tint enthusiast's light. The SST-40 is cool and low-CRI, which is the trade for the output and reach. The other thing worth knowing is a Sofirn family trait rather than an SP35-specific fault: the thermal sensor on several models in this range ships poorly calibrated and can decide the light is overheating and step down early. There are published calibration procedures for it.

Consistently praised

Build quality reviewers rate as good even ignoring the price
USB-C charging at around 2A — genuinely quick for a single 21700
Smooth reflector gives a well-defined hotspot and useful throw for the size
Around 2,000 lumens and 330 m of reach from a common, cheap cell
Simple to live with — no firmware to learn

Common complaints

Cool, low-CRI SST-40; colours look washed out next to a high-CRI light
Sofirn's thermal sensor calibration can trigger early step-down on this generation
No magnetic tailcap
Beam is unremarkable — competent rather than clean
Reviewed less widely than Sofirn's headline models, so there's less independent data

Questions people ask

What's the difference between the SP35 and the SP35T?: The SP35T is the tactical variant with a dual-switch tail and a forward clicky for momentary use. The SP35 is the side-switch version. Same body, different interface.
Why does it step down so early?: Often a miscalibrated thermal sensor rather than genuine overheating — a known quirk on this Sofirn generation. The temperature calibration can be reset, and published guides walk through it.
Does it take 18650 cells?: It's built around a 21700. Some Sofirn 21700 lights ship with an adapter sleeve for 18650s, but contact can be less reliable and you lose most of the capacity advantage.
Is the beam good for outdoor use?: Yes — the smooth reflector puts a usable hotspot a few hundred metres out, which suits walking and property checks. For close work the cool, low-CRI tint is its weak point.

Sources (3)