Olight Open Pro EDC Flashlight Pen Combo Review

Olight Open Pro EDC Flashlight Pen Combo Review

The Olight Open Pro is the third edition of this device from Olight, and yet another refinement.  The bolt action pen features a pocket clip emitter and an e-switch. Read on!

Official Specs and Features

Here’s a referral link to the official product page on olightstore.com.


Just two versions as far as I can tell.  Blue and black (seen here).  Blue is limited edition!


The Olight Open Pro is selling now for the introductory sale price of $48.97 (for black) and $52.47 for blue.  They’re both available at Olightstore.com.

As usual, here’s some Olight sale info you probably need to know!

Summer Sale Date: 8:00 PM 7/26 to 11:59 PM 7/30 EDT

During the Olight sale, A free X9R Cell (value $15.95) will be added to the shopping cart when customers log in to their accounts.

Open Pro

Open Pro Black, 30% OFF, $48.97 (MAP: $69.95);

Bundle i3T BK40% OFF$53.94 (MAP: $89.90);

Bundle Open Pro Blue, 40% OFF, $86.94 (MAP: $144.90)

Open Pro Blue (limited edition), 30% OFF, $52.47 (MAP: $74.95);

Bundle Obulb Purple, 40% OFF, $56.94 (MAP: $94.90)

Short Review

Bolt action pens are still not my jam, but I appreciate the other improvements on the Olight Open Pro.  The pocket clip emitter adds functionality (can be used while clipped!) and there’s now a laser!  This is a better Open.

Long Review

The Big Table

Olight O’Pen Pro
Emitter: Unstated, but “3000K”
Price in USD at publication time: $48.97
Cell: Internal 110mAh LiPO
Turbo Runtime Graph High Runtime Graph
Switch Type: E-Switch
Quiescent Current (mA): ?
On-Board Charging? Yes
Charge Port Type: USB-C
Charge Graph (see description below)
Power off Charge Port Yes
Claimed Lumens (lm) 120
Measured Lumens (at 30s) 111 (92.5% of claim)^
Candela per Lumen 0.4
Claimed Throw (m) 14
Candela (Calculated) in cd (at 30s) 11lux @ 2.256m = 56cd
Throw (Calculated) (m) 15.0 (107.1% of claim)^
All my Olight reviews!

^ Measurement disclaimer:  I am an amateur flashlight reviewer.  I don’t have $10,000 or even $1,000 worth of testing equipment.  I test output and such in PVC tubes!!  Please consider claims within 10% of what I measure to be perfectly reasonable (accurate, even).

What’s Included

what's included

  • Olight Open Pro Pen Flashlight Combo
  • Ink refill (spare)
  • Charge cable (USB to USB-C)
  • Manual

Package and Manual

package package


Build Quality and Disassembly

feature photo

The build quality here is good, and fairly standard fare for Olight.

pocket clip

special screw

I took forever to figure out what that little thing on the “clicker” (it’s not a clicker) was.  I thought it was a capacitive switch for the longest.  Turns out it’s not, it’s just the green laser output area!


The flashlight part easily disconnects from the pen part.  This is really two separate devices!


Size and Comps

Weight 1.23oz/35g (Including Battery and Refill)
Length Length: 6.02in/153mm (Tip Retracted)

If the flashlight will headstand, I’ll show it here (usually the third photo).  If the flashlight will tailstand, I’ll show that here, too (usually the fourth photo).


Here’s the test light with the venerable Convoy S2+.  Mine’s a custom “baked” edition Nichia 219b triple.  A very nice 18650 light.

And here’s the light beside my custom engraved TorchLAB BOSS 35, an 18350 light.  I reviewed the aluminum version of that light in both 35 and 70 formats.

beside torchlab boss 35

Retention and Carry

pocket clip

Really just the pocket clip here, and would you expect more?  The big improvement with the Olight Open Pro is that the light output is on the pocket clip.  So the light can be used while on a pocket!

Power and Runtime

I didn’t tear it down to the cell, but Olight says it’s a 110mAh LiPO.  A couple of runtimes follow.

runtime graph runtime graph

I didn’t observe the light shutting off, but you’ll notice that the output drops dramatically toward the end.


Charging for the Olight Open Pro is by USB-C.  The port is beside the switch light switch.

USB-c charge port

An appropriate cable is included.  It’s USB to USB-C.

charging cable

This charge graph is a little different.  The solid line is charging from USB to USB-C.  The dashed line is charging from C to C.  So yes, C to C works and is practically the same as with USB.

charging graph

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
High 120 23m 111 ?
Med 60 45m 54 ?
Low 20 120m 20 ?
Moon 5 8h 15 ?

Pulse Width Modulation

Unfortunately, every mode has PWM.  And on the lower modes, it’s quite slow (aka “bad”) PWM, too.

For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor.  Also, here’s the light with the worst PWM I could find.  I’m adding multiple timescales, so it’ll be easier to compare to the test light.  Unfortunately, the PWM on this light is so bad that it doesn’t even work with my normal scale, with is 50 microseconds (50us).  10ms5ms2ms1ms0.5ms0.2ms.  In a display faster than 0.2ms or so, the on/off cycle is more than one screen, so it’d just (very incorrectly) look like a flat line.  I wrote more about this Ultrafire WF-602C flashlight and explained a little about PWM too.

User Interface and Operation

A single e-switch operates the electronics of this light/pen combo.  The switch is hidden away on the inside of the screwed-together part, and only accessible when the parts are separated.

Again, this is really a two-part device.  Something that you’d use separately, most likely.


The e-switch has very low action but is a bit proud so not hard to find when accessible.

However!  However, the bolt action of the pen can be pushed upward (toward the flashlight) and can operate the e-switch!  It’s really a fantastic bit of design to incorporate the bolt action into the flashlight usage.  The operation of sliding the bolt action into the e-switch is the same exactly as just using the e-switch, so I’ll just cover all that with one table.

Here’s a UI table!

State Action Result
Off Click Moon
On Click Off
On Hold Mode advance Lowest to highest
Any (except laser: on) Double click High
High Double Click Moon (if starting from off) or
Mode memory (if starting from on)
Off Hold Switch Green Laser

LED and Beam

Olight doesn’t specify the emitter here but does make the specific claim that it’s 3000K.


Again, the emitter on the Olight Open Pro is on the pocket clip, which I find both interesting and fascinating, and probably arguably much more usable than the other iterations of this device.


The laser is neat too and really useful if you’re the type to need a laser pointer.

laser output laser output laser output

These beamshots are always with the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure.

Below are the four white modes, then two photos of the single green output.  The first green laser photo demonstrates that a little bit of smudge or whatever over the laser output area can really diffuse the laser.  (But there is just one laser output level.)

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.

beam shots against door compared to nichia 219b

I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!


The pen is a fairly common bolt action.  I would only use this unattached to the light, and as such it makes a nice small-length pen (which I greatly appreciate.)

This is a standard refill size.

pen refill

It ships wax capped.

wax tip wax tip

And without the flashlight attached, fits nicely in hand!

pen only in hand


What I like

  • Pocket clip flashlight output
  • USB-C charging
  • Two separate devices that work fine separately
  • Warm emitter output (claimed 3000K)
  • Green laser is exceptionally useful!
  • Bolt action of pen can operate e-switch!

What I don’t like

  • Pocket clip flashlight output
  • Bolt action pens (all of them)
  • Output is almost certainly cooler than 3000K


  • This light was provided by Olight for review. I was not paid to write this review.
  • This content originally appeared at zeroair.org.  Please visit there for the best experience!
  • For flashlight-related patches, stickers, and gear, head over to PhotonPhreaks.com!
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