Vezerlezer ED10 Review – A Great Start


The Boring Stuff

Vezerlezer sent me this light in exchange for an honest review on They do great work and have a much larger catalog of reviews than I, so I highly recommend checking them out. This will be all of that same information, just reformatted to fit my website. Here is the official product page. At the time of writing, it’s priced at $52.98. Below are the official specs or “parameter” straight from the official website.

What comes in the box?

ED10 comes in a nice retail box with attractive graphics and plenty of info about the light. Inside is a typical, thin, molded plastic insert that does an adequate job of holding the light in place. The following items are included in the box:

  • The flashlight itself
  • Battery (inside the light)
  • USB A-to-C charging cable
  • Lanyard
  • Spare O-ring
  • User manual

Design & Construction

ED10 has a reasonably attractive design, particularly the unique helical texture on the body tube. The head has some large flat spots which prevent the light from rolling away on a table. As far as I can tell, nothing except the driver is glued. Horay! I do find the branding a bit much, with the name “Vezerlezer” printed on the light in three separate places (one being a URL). A simple “Vezerlezer ED10” printed on the head under the button would have been more tasteful.

Build quality is fairly good, and appropriate for this price point. There are no sharp edges nor any blemishes in the anodizing. The threads are anodized, trapezoid cut, smooth, and appropriately lubricated. They’re not too fine nor too long. Battery swaps are fairly easy from the head, but the tailcap can be a little slippery. There are high quality plated springs on both the tailcap and the driver. The bezel can be removed, but the “HOT” logo on it never aligns with the button which might bother some users. The anodizing is smooth and shiny.

Size & Measurements

Next to some other 18650-size EDC lights. From left to right:
Noctigon KR1
Skilhunt H04 RC
Vezerlezer ED10
Emisar D4V2
Convoy M1

Next to some other miscellaneous lights. From left to right:
Convoy S12
Fireflies E07 2021
Vezerlezer ED10
Fireflies E07x Pro

MeasurementMeasured (mm)
Bezel Diameter27.1
Head Diameter (maximum)32.1
Switch Diameter8.4
Switch Proudness0.9
Lens Diameter24.4
Lens Thickness1.5
Reflector Hole Diameter6.0
Reflector Diameter24.5
Reflector Height15.2
MCPCB Size18
Body Tube Diameter (internal) 19.2
Body Tube Diameter (maximum)24.6
Body Tube Diameter (mode)24.6
Body Tube Length72.1
Ride Height (sticking out of pocket)8.9
Pocket Clip Space (for pants material)3.0
Pocket Clip Space (at mouth)2.8
Pocket Clip Width6.2
Pocket Clip Thickness0.8
Pocket Cip Slot Width4.2
Pocket Clip Slot Diameter22.9
Tailcap Diameter24.5
Tailcap Length13.6
Driver Diameter20
USB Port Width12.0
USB Port Depth2.3
USB Port Height7.5
Included Battery Length69.8
Included Battery Diameter18.7

Weight without battery: 79g / 2.8oz
Weight with included battery: 130g / 4.6oz

User Interface

I’m genuinely impressed by this user interface. It’s not perfect, but most brand-new flashlight manufacturers tend to botch the user interface. Vezerlezer did an excellent job.

The actions are # of presses followed by a hold (H) or a release (C). So, “1C” is one click and release. “2H” is two clicks but you hold down the last one.

Off1COn (mode memory)
Off / Turbo1HMoonlight (if stepped ramp) or Eco (if smooth ramp) (memorized)
Off1H (5+ seconds)Switch between stepped and smooth ramp
Any2CTurbo (not memorized)
Any3CStrobe (not memorized)
Any4CSOS (not memorized)
On (normal modes)1COff
On (normal modes)1HIncrease Brightness (stepped or smooth)
On (normal modes)1H+release+1HDecrease Brightness (stepped or smooth)
Moonlight1HIncrease Brightness (stepped or smooth)
Turbo / Strobe / SOS1CReturn to previous state
Lockout5CUnlock to Off

I only have one significant complaint: Moonlight is only accessible when using the stepped ramp, not when using the smooth ramp. You shouldn’t lose Moonlight mode just because you prefer a smooth ramp. With that said, here are a few minor nitpicks that I think could be improved on in a future revision while they are fixing the moonlight thing.

  • In Turbo, Strobe, or SOS, 1C will return the light to the previous state (off, or the previously used mode). I would have preferred 1C to always be off, and for 2C to return to the previously used mode.
  • There are one too many modes. High mode should be eliminated and Eco, Low, and Medium should be renamed accordingly.
  • Moonlight has a dedicated shortcut, so it should not be memorized nor be in the main mode rotation.

Modes, Brightness & Throw

Disclaimer: Lumen measurements were taken on a Texas Ace 3.5″ Lumen Tube. A candela measurement was taken at 10 meters with an Opple Light Master III on the highest brightness, and other candela figures were calculated relative to that. Runtime tests were performed with the Ceilingbounce app on my smartphone. All of these tests were performed with a fully charged included battery unless otherwise specified. I cannot measure moonlight directly, so moonlight readings are calculated based on the brightness relative to the next-lowest mode.

Level Lumens (@ Turn-On)Candela (@ Turn-On)Throw (meters)

Mode Spacing: The mode spacing is OK except for High mode. It’s too close to Turbo and doesn’t provide any meaningful benefit over Turbo. In future revisions it should just be eliminated and the other modes should be renamed accordingly.

How does it compare to the official specs? I measured 1980 lumens on Turbo @turn-on which is probably within the margin of error for my lumen measuring setup, so I’ll call the 2200lm advertised output “reasonably accurate”. All the other modes are “reasonably accurate” too. I actually measured slightly over the quoted throw at 310m (vs 305 claimed) so that’s good.

Moonlight & Tint Comparison from left to right:
Fireflies E07 2021 | Nichia 219B SW45k | 0.01lm
Noctigon KR1 | SFT40 |
Vezerlezer ED10 | SST40 | 0.5lm
Emisar D4V2 2-Channel | LH351D 5700K | 1.3lm
Fireflies E07x Pro | SST20 4000K | 1.3lm

Moonlight is weird. With a full battery, it’s 0.5lm. With a near-dead battery, it’s so dim I can hardly even see the emitter lighting up with the room lights turned off. It’s heavily affected by battery voltage, even more than any other mode in the light. I’ve never seen this behavior from a moonlight mode before and I’ve got no explanation.

Runtime & Currents

Performance: Turbo and High step down fairly quickly, lasting 2-3 minutes. Stable output is right around 400 lumens which is about right for a host this size with an efficient emitter like SST40 and an in-efficient FET-based driver. Turbo and High mode perform so similarly that I don’t see any benefit to using High over Turbo. They have a little trouble finding thermal equilibrium at first, but stabilize after about 30 minutes. Medium drifts downward with cell voltage throughout its runtime, but it appears to be the sweet spot for getting as much brightness as possible without inducing thermal throttling. Low mode is way flatter and way longer running than the three higher modes, because Low mode appears to be regulated by the 7135 part of the driver.

LVP: is present in the light itself, not just in the battery. The switch will blink red as a warning when the battery is low, and the light will eventually shut itself off completely. There’s no low voltage warning from the main emitter.

Current: I’m not equipped to do extreme duration runtime tests or extremely high current measurements. I only measure the currents on low modes and I calculate the estimated runtime of those modes based on the capacity of the battery or batteries I’m using for testing.

LevelCurrent @ Tailcap (milliamps)Estimated Runtime
Eco70.537 hours
Moonlight12.399 days
Standby (parasitic drain)2.839 days

That parasitic drain is problematically high. It’s not necessarily a deal-breaker if you use mechanical lockout when the light’s not in use, but Vezerlezer really needs to address that. It should be a few dozen microamps, not a few milliamps.

Driver & Regulation

ED10 uses a “mos+7135” driver (FET+1). This is a common driver design on inexpensive lights, as it allows for decent efficiency and (ostensibly) good regulation on low modes while also offering very high current at high brightness. The downside is that higher modes are fairly inefficient so the light will heat up faster, step down harder, and use more battery on higher modes compared to more sophisticated driver designs.

Regulation is… weird. It seems that all the modes except Low (and including moonlight) are affected by battery voltage. The higher levels being affected makes sense as this is a FET+1 driver, but theoretically all the lower modes should be well regulated by the 7135 chip. This was particularly noticeable to me when changing modes on a near-dead battery. Low mode and Medium mode were virtually indistinguishable from each other.

The strangest bit is that moonlight is highly affected by cell voltage! With a near-dead cell, moonlight was so dim I could hardly see the emitter lighting up unless I was in near pitch black darkness. Yet, I could easily jump up to Eco mode which was still producing over 15 lumens! I’ve never seen that behavior before. It’s not really a problem, but it’s inexplicable.

Note: All regulation measurements are taken at turn-on so they do not reflect any thermal or low voltage stepdowns that may occur. A value of 0 indicates low voltage shutoff immediately upon activation.

Thermal regulation: is present and works well enough. The light does get a little too hot to hold, but not to the point that its dangerous to the light.

PWM: No PWM is visible to my eye. My Opple Light Master III was able to detect PWM on most of the modes. PWM makes sense considering this is a FET+1 driver, but the Opple said it’s at 31,665hz which seems suspiciously fast to me. So, take that with a grain of salt.

Emitter & Beam

ED10 uses the popular Luminus SST40. It’s a domed emitter that’s popular because of its efficiency and brightness, not for its lackluster color properties. It sits at the bottom of an orange peel reflector which threads in. I’ve never seen a design where the reflector threads into the head from the front before, so that’s neat. The centering gasket is also interesting, as it’s concave and the mating surface of the reflector is convex. This means they will always align perfectly even if they aren’t sized exactly. Clever! The bezel can be easily removed.

The beam is very cool. There’s a lot of tint-shift, so the hotspot is significantly warmer and greener than the spill. Fortunately there are no strange artifacts, thanks to the orange-peel reflector.

I did some testing of each mode in the center of the hotspot with an Opple Light Master III. I got a color temperature range of 5400K to 7500K, with higher modes being cooler and lower modes being less cool. I got an Ra (CRI) range of 52 to 67. DUV/tint is on the greener side with a range of .0052 to 0.0269.

Vezerlezer ED10

In the beamshots above, the trees where I’m aiming the hotspot are 175M away. In the beamshots below, the park bench where I’m aiming the hotspot is 42M away.

Vezerlezer ED10

This is a great beam for general outdoor use. It’s got enough throw to see where you want to see and enough spill to see your surroundings. The hotspot isn’t so tight that it’s problematic when used at short distances, and the spill is bright enough that even it provides some decent throw.


ED10 uses a metal, backlit, electronic, side switch. It’s pretty good, with an audible click and plenty of tactility. The metal boot is a little wobbly but not too bad. It’s also plenty easy to find in the dark.

Right in the middle of the switch is a transparent section that allows backlighting through to indicate battery status. When unplugged, green means 75-100%, orange means 50-75%, red means 25-50%, and blinking red means 0-25%.

Carry & Ergonomics

ED10 is fine ergonomically. There are no hotspots and it’s comfortable to use. The spiral texture on the body is not the grippiest, so it might slip if your hands are wet. A forward grip or pencil grip work great and my finger lands right on the button in either grip.

It carries fine in the pocket. When fully seated, it’s a nice deep carry but is still easy enough to retrieve from the pocket. The clip has enough ramp that it’s easy to slide over pants material and the clip is stiff enough to hold the light securely. I did find that occasionally when pocketing the light, my pants material would catch at the red line instead of the green line because of the little protrusion from the clip. Not a big deal, but it’s something Vezerlezer can fix on the next iteration.

The body tube is not reversible, but the clip is. The lanyard loop in the tailcap is cut in such a way that it doesn’t create an ergonomic hotspot nor inhibit tailstanding. There is no magnet in the tailcap, nor any room to add one. That would have been a nice inclusion.

Batteries & Charging

Vezerlezer includes a protected, button top, 2600mah, 18650 battery with ED10. It’s an adequate cell, but the capacity is low for this price point. For $50 I would have expected it to come with a 3500mah cell. I also tried an unprotected flat top cell and it worked just fine. There are beefy, gold-plated springs on both the driver and in the tailcap so battery compatibility should not be a problem.

There’s a USB-C charging port directly opposite the switch, covered by a rubber flap port cover. The port cover works fine and seals well. There’s a little tab to help you open it, but you have to grab and pull on the tab to get it open. Something accidentally brushing against the tab is not enough to open the port. Most new manufacturers tend to do a poor job with the port cover, but Vezerlezer has done well here. It’s worth noting that you cannot rotate the cover out of the way, and no extra covers are included.

When charging, the transparent portion of the switch will light up. Blinking red means charging and green means fully charged. Charging worked fine on my sample with A-to-C cables and C-to-C cables.


Here are some lights in the same class and how they compare.

Sofirn SC31 Pro: less expensive, marginally higher capacity, fancier UI, same LED but two color temperatures, similar driver, available on Amazon, less expensive, optional always-on backlit button, includes diffuser & magnetic tailcap (on the specific version I linked)

Sofirn SP35: less expensive, a little larger, a little heavier, nearly double the battery capacity, same LED but two color temperatures, very similar UI, much better driver, available on Amazon

Wurkkos FC11: not as bright, higher quality LED in warmer temps, magnetic tailcap, very similar UI, marginally higher capacity, significantly less expensive, available on Amazon

This section is not comprehensive. If I didn’t include a particular light here, it doesn’t mean it’s bad or doesn’t deserve to be here. I simply cannot list every possible competitor.


ED10 is Vezerlezer’s first light, and it’s a great start. Vezerlezer got a lot of things right on this light that most manufacturers don’t, and I look forward to seeing what they release in the future. With that said, I can’t recommend you actually buy ED10. The price isn’t competitive with what other manufacturers are offering, and because of the quirks Vezerlezer still needs to work out (parasitic drain, no moonlight in stepped ramp, strange regulation, low-capacity battery).

Thanks to Vezerlezer and for sending me this light for review!

One thought on “Vezerlezer ED10 Review – A Great Start

  1. There’s a coupon that drops the price to $30 for the entire kit which is pretty competitive considering the build quality being better than Sofirn. Just needs some bugs fixed and it would be fairly decent

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