Speras E10

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Speras E10 review

Speras E10 specifications

Brand & ModelSperas E10
Flashlight categoryGeneral purpose
LEDLuminus SST40
Lumens1300 lumens
Beam distance175 meters
Beam intensity7,625 candela
Battery config.1 x 18650
Onboard chargingUSB-C
ModesTurbo, high, medium, low
BlinkiesStrobe, SOS
Review publication dateOctober 2022


Speras is a Chinese company that’s been around for a while, focusing mainly on tactical applications for law enforcement, hunting, and everyday carry. Their products run the gambit from the strange to the barebones essentials, such as a zoomable dimming hunting greenlight to one of the lights I have here, the Speras E10

Package quality.

The package is a pretty standard retail box which actually comes factory sealed, a nice touch. It’s pretty bare bones but I think for this light it makes a lot of sense given Speras’s focus on tactical products. On the back is a really nice breakdown of the light’s specifications for each mode and some information on the E10 itself. They also include an 18650 with the light. 

  • Speras E10 flashlight
  • 18650 3100 mAh battery
  • USB-C cable
  • Lanyard
  • Spare O-rings
  • Manual

Flashlight in use

The E10 is rather standard light, it does not excel in one particular category, and performs very well in many. It is a fairly standard form factor for an 18650 light, not too long, not too wide, and uses a side electronic switch for control. This lends itself to a UI I am not a huge fan of, where you press and hold the button to cycle through preset modes with no ramping option. However, with mode memory, this is not a huge inconvenience and for a “tactically” oriented light isn’t unreasonable. 

This is where the light almost reaches a crisis of purpose though. It is styled largely like a tactical light, borderline identical to its big brother, the Speras EST, barring the rear clicky switch. As a tactical light, the lack of such a rear switch is a significant detriment to its capabilities as such, and forces the user to go through the side switch to turn the light on and off. However, it is much shorter than the EST, and I consider it very well suited for an EDC light due to this. 

It has the convenience of onboard USB-C charging, a crenelated bezel, and a pretty solid pocket clip. Nothing more than you need, no fancy features, it is an EDC light at its essence. I rather like it for that.

Build Quality, and Warranty

The E10 is made of “aerospace” grade aluminum 6061. The build quality is very nice. The anodization is a hard coating to protect the metal underneath. There are no sharp edges, and the threads are very well cut and come lubricated. Small heatsink fans are located near the driver to help keep it cool, however likely will not achieve that much. I did have one issue, where the retaining ring around the side switch popped out after being run on turbo. Overall, very nicely built and expertly blends form and function.

LED, Lens, Bezel, Beam, and Reflector

The E10 uses a single Luminus SST40 which is a pretty popular LED in lights of this size, especially due to its high output and efficiency. This comes with the usual downside of a low CRI and, depending on your preferences, a very high tint. 

The SST40 is sat under a TIR (total internal reflection) optic which is known for producing a very clean hotspot with not a lot of spill. Speras has chosen one with a quirk: the inner “ring” of the optic, aka the internal reflector, is diffused. This results in a clearly defined hotspot of a large size due to the diffusion, however there is still a pretty sharp transition to the spill which provides “working” light.

Data from the Opple Light Master at 6.3 meters on High:

Dimensions and size comparison


Length106 mm4.17 in
Head diameter25.4 mm1 in
Body diameter25.4 mm1 in


WeightWeight in gramsWeight in Oz.
Without battery:74 g2.61 oz
With battery119 g4.2 oz

Flashlight size comparison with its competition:

Group 1: Acebeam E70, Speras E10, Convoy S2+

Driver & User Interface:

Available modes: 

  • Low, medium, high, turbo

Available blinky modes:

  • Strobe, SOS

Side Switch

From OFF:

  • Single click:  On
  • Double click:  Strobe

From ON:

  • 1 click:  Off
  • Hold: Cycle through modes: low → medium → high → turbo

Mode memory:

  • Yes

Low voltage warning:

  • Side switch glows red


  • Strobe, SOS

Batteries & Charging

The Speras E10 ships with a Speras branded 3100 mAh 18650 included which has a protection circuit installed. I tested with Samsung 30Q and it appeared to work just fine. Speras indicates it should take roughly 4 hours to charge, mine was charged up in 4 hours and 15 minutes, so not bad.

Performance test

Lumens were measured using my homemade integrating tube with a Tripplet LT68 datalogging lux meter. I used the included 3100 mAh EB31 battery by Speras, fully charged. 

Lumen measurements (for each mode)

ModeSpecsturn on30 sec10 minutes
Low1010.1 lm10.1 lm10.0 lm
Med10091 lm90 lm89 lm
High400306 lm306 lm302 lm
Turbo1300975 lm939 lm376 lm

(Note from Marco: these lumen measurements may differ from actual measurements. The lumen measurement setup will be tuned in the following reviews)

Battery Life: Runtime graphs

Runtimes were measured with the same tube and meter, again with the fully charged EB11 battery. The low and medium runtime tests had to be aborted as the memory on my luxmeter became full, and the specified runtimes are well over what can be reasonably verified.

ModeSpecifiedMeasured runtime ANSITime till shut off
High5.25h4h 59min6h 09min
Turbo4h3h 59min4h 40min
  • (Aborted due to data logger memory overflow and no significant dropoff)

ANSI FL1 standards: The runtime is measured until the light drops to 10% of its initial output (30 seconds after turning on). This does not mean that the flashlight is not usable anymore. The last column shows how long the light actually works till it shuts off. If there is a + symbol, it means that the test was stopped at that particular point, but the light was actually still running. This happens on certain occasions, with certain drivers, firmware, or batteries.

Peak beam intensity and beam distance measurements

All measurements were taken at 5 meters with a fully charged EB31 3100 mAh 18650 battery. 

ModeSpecifiedCandela measuredMetersYards
High100m2273 cd95104
Turbo175m8172 cd181198

Extra info: Peak beam distance according to ANSI FL1 standards: The calculated value of distance in meters at which the flashlight produces a light intensity of 0.25 lux. (0.25 lux is about the brightness of a full moon shining on an object). The meters and yards columns use rounded numbers.


Camera settings and distance: Canon EOS Rebel, 1/20s, ISO 200, F5.6, at 5 meters.

Disclaimer: This flashlight was sent to me for review at no cost by Speras. I have not been paid to review, nor have I been holding back on problems or defects.

Final Verdict


  1. Very good output and excellent regulation
  2. Very nice build quality
  3. High runtimes with a 3100 mAh battery
  4. Excellent usable hotspot area


  1. Charge port cover presents a weak point in the light
  2. Depends on side switch for a “tactical light”
  3. Pocket clip could be a bit better

Explanation on star ratings:

1: Avoid: a match would be a better choice – 2: Poor: significant defect or issues; almost unusable – 3: Average: some defects or issues; but still usable 4: Good: recommended (minor issues) – 5: Great: highly recommended

Reviewer Max
Author: Max

4.5 stars: ★★★★⋆

Boasting strong runtimes and outputs, along with a nice 18650 form factor, it is very appealing. As an EDC package, it is excellent. While I am not a huge fan of the UI, as an EDC/tactical “hybrid” it does make sense. This light is an excellent option if you are looking for something simple that will get the job done, with no fancy features or crazy UIs to learn. A very very nice option in a cluttered world of EDC lights, and a breath of fresh air.

Buy your Speras E10 here:

1lumen selects and reviews products personally. We may earn affiliate commissions through our links, which help support our testing.