Speras E10

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Speras E10 specifications

Brand & Model	Speras E10
Flashlight category	General purpose
LED	Luminus SST40
Lumens	1300 lumens
Beam distance	175 meters
Beam intensity	7,625 candela
Battery config.	1 x 18650
Onboard charging	USB-C
Modes	Turbo, high, medium, low
Blinkies	Strobe, SOS
Waterproof	IP68
Review publication date	October 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

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.

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.

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: 

Dimension	Millimeters	Inches
Length	106 mm	4.17 in
Head diameter	25.4 mm	1 in
Body diameter	25.4 mm	1 in

Weight: 

Weight	Weight in grams	Weight in Oz.
Without battery:	74 g	2.61 oz
With battery	119 g	4.2 oz

Flashlight size comparison with its competition:

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

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/blinkies

• Strobe, SOS

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.

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)

Mode	Specs	Lumens @turn on	Lumens @30 sec	Lumens @10 minutes
Low	10	10.1	10.1	10.0
Med	100	91	90	89
High	400	306	306	302
Turbo	1300	975	939	376

(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.

Mode	Specified runtime	Measured runtime ANSI	Time till shut off
Low	157h	12h+	12h+
Med	22.5h	12h+	12h+
High	5.25h	4h 59min	6h 09min
Turbo	4h	3h 59min	4h 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. 

Mode	Specs	Candela measured	Meters	Yards
Low	20m	92	19	21
Medium	55m	721	54	59
High	100m	2273	95	104
Turbo	175m	8172	181	198

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.