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Gerber Cortex Flashlight
Gerber Cortex Flashlight

Cortex Flashlight


Item: # 30-000821

Adaptability is a part of life for the modern tactical professional, every item must be worth its weight. The Cortex flashlight can utilize multiple power sources, running on 3 lithium CR123 or 2 AA batteries. With a max output of 675 lumens and a strobe option, you will never be in the dark.

Currently Out of Stock

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    • Material: Aluminum
    • Weight: 4.8 oz.
    • Length: 6.15 in.
    • LED Type: Cree XML
    • Batteries: Accepts (3) Lithium CR123 batteries or (2) AA batteries
    • Comes with (2) Alkaline AA batteries. CR123 batteries not included.


    • High Mode Output : 675 lumens
    • High Mode Runtime : 1.75 hours
    • Low Mode Output: 30 lumens
    • Low Mode Runtime : 40 hours


    • High Output : 390 lumens
    • High Output Runtime : 1.0 hours
    • Low Output: 28 lumens
    • Low Output Runtime : 15 hours
  • Warranty
  • Warranty

Adaptability is part of life for the modern day tactical professional. The Cortex Flashlight is built with adaptability in mind. Running on either three (3) Lithium CR123 batteries or two (2) AA batteries, the Cortex can utilize multiple power sources when having options is critical. With a maximum output level of 675 lumens (when running on three CR123 batteries), the Cortex provides a level of light useful for overwhelming an aggressor or identifying a threat. The Cortex also offers a strobe mode for tactical applications and a low output mode for administrative duties. Proudly built in Portland, OR.


Rating Snapshot











Overall Rating

  • 4
  • |4 out of 5 stars
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  • 1 5
  • |APR 1, 2019
  • |BY: , Federal LEO

On the third light now, just got a new one from the factory to replace the second one I had gotten from the factory which only worked in the strobe mode. Third one worked for a few days, now won't even turn on. Tired two different sets of batteries to make sure. No luck. Back to the factory. Have a Stinger Dual switch that I wear on my duty belt and it gets used a lot harder than this light does and have no problems with it at all. And its cheaper!

  • 5 5
  • |NOV 13, 2018
  • |BY: , IT/Communications Specialist

I have owned my Cortex for well over a year now. I am an IT/Communications Specialist; I am under floors, up in drop ceilings, under desks, and in comm closets. I am constantly using it to shine some light into my equipment cases, or the racks that house them. I use my Cortex every single day; so much that I go thru AA's every 2-3 weeks. This is by far, the best flashlight I have ever owned: it is nice and heavy so when you drop it, it doesn't smash into a thousand pieces. Beautiful, bright, natural white light. Other than some very minor damage (from dropping it), and losing the bluing around the edges, it still looks and performs just as good as the day I bought it. My one recommendation: buy a sheath. It is rather large, so if you carry it on the outside of your pocket, it will get caught on stuff. If you carry it on the inside of your pocket, it will wear a hole in your pants.

  • 1 5
  • |MAY 7, 2018
  • |BY: , Your Title

Ordered on the 19 April, called many many time for support because the order detail tab won’t expand for details. Yep, was promissed to be delivered on May 03. May 07, it’s still not here, and I still cannot see the order in my account. Called again many many time, noone picked up. Emailed again, and you know what happened? It hasn’t even been shipped yet. WoW!!! Talk about shitty customer services, this is unprecedentedly disgusting!!!!!
For one, fix your website, it’s 2018. Customers need to look in to their orders for references. And two, ship the damn order when you get the money for it. Also, use a shipping service that provides a tracking number, again, it’s 20-fucking-18. You go buy a toilet plunger for 2 bucks on ebay you get a tracking number, a 120$ flashlight doesn’t have one, and won’t get ship after 20 days.

  • 4 5
  • |NOV 29, 2017
  • |BY: , Your Title

One of the best flashlights I've ever owned. In fact I lost one on the job and bought another one a few weeks later. (I was hoping to find the old one) The belt clip could be better but Gerber sent me a new one when I asked for it. Being powered by either 2 AA or 3 C123 batteries makes for a big convenience. It's weight is great for EDC and it feels good in the hand when shooting. I'd give it 5 stars but I think the 675 lumen rating is a bit of a stretch. I have multiple lights above and below 675 and this is a bit brighter then the ones rated at 500. More than bright enough to light up dark rooms or alleys. If they had a pressure switch and a weapon mount for it I'd definitely get one for my patrol rifle.
Overall, well worth the money.

  • 1 5
  • |OCT 15, 2017
  • |BY: , former customer

I purchased this flashlight and was very impressed with its performance for the first 6 months I owned it. It was great at first, but then the high beam completely stopped working so all it was good for was the low beam and strobe. This basically rendered the flashlight useless. I looked up gerbers warranty and filed a claim and sent it in. That was a month and a half ago and the only response I have gotten was them notifying me that they received it. Multiple calls and voicemails left to them and still nothing.
I have 10+ gerber knives but I can guarantee that this light will be the last gerber product that I ever purchase.

  • 1 5
  • |JUN 1, 2017
  • |BY: , Police Instructor

I bought a similar model Cortex Compact about 1 year ago maybe less. I use it about once a week - when it works. I have sent it back 3 times for repair and each time Gerber has honored the warranty but I bought it because I needed it and sending it back multiple times defeats its purpose. I recently retired and changed jobs, I put the flashlight in a drawer - batteries out - and left it since Nov 2016 untouched. Took it out today, put in batteries and wouldn't you guess? It doesn't work. Going in the trash this time around and another Gerber light will not be bought.

  • 5 5
  • |APR 28, 2017
  • |BY: , Army Retired

I bought one of these to replace a surefire I lost, have owned it since this model first came out, I love it, it has taken all kinds of abuse and is still running strong. I like the ability to use different kinds of batteries, because I can always find something to put in it. Have used it for hiking and camping and all around the house and yard, as well as taking it with me anywhere I need light. I have bought them for other family members because they loved mine and having good light is always a necessity. I would recommend it to anyone and have many times.

  • 5 5
  • |JUL 30, 2016
  • |BY: , Warranty

I had a TX 4.0 that had been deployed twice and the tail cap switch stopped working after 4 years. I sent it in and they sent me this flashlight as a replacement. While I still like the design of the tx 4.0 a little better this is a more capable replacement and it's good to know they stand by their warranty.

  • 4 5
  • |JAN 30, 2016
  • |BY: , Solid Light

I've had this light for over a year and I've been very happy with it's performance. Feels much more solid than some of it's competitors. It does eat through CR batteries pretty quickly but I always have AAs sitting around. As a result, this light is already ready for more abuse. I love that, after especially nasty jobs (plumbing or car brakes) I scrub it down with some dish soap and it's ready to go.

  • 5 5
  • |OCT 6, 2015
  • |BY: , Army & Fire

Fantastic light. Anodized aluminum, over 600 lumens, and runs on AAs AND 123s. MADE IN THE USA. What else is there to say.

When can I purchase an Omnivore weapons light?

  • 5 5
  • |MAY 29, 2015
  • |BY: , Your Title

I had been eyeing this light for a while and found it for a pretty good deal. Now that I have used it I would definitely pay full price. The omnivore concept is awesome. I had another flashlight that used cr123 and they can be a pia to find some times. This light has held up great these past few months in the desert and love the fact I can use whatever batteries are available. Awesome product! Now when are the omnivire weaponlights coming out?

  • 5 5
  • |DEC 18, 2014
  • |BY: , Combat Medic

I bought this light for my deployment to Afghanistan and I couldn't be happier. This light has out-performed any other flashlight I have ever used. For the price, it is the brightest light you can buy. I have used it to light up our entire tent before. I would recommend this to anyone.

  • 5 5
  • |SEP 14, 2014

I'm a medic for the Army in Afghanistan right now and this tactical light is, by far, one of the best lights I have ever used. The best that Gerber has to offer. It is extremely durable, well made, very functional, and ridiculously bright! Batteries last for as long as you'd expect with such a high-lumen output. The only changes I'd make would be to redesign the clip and make it more secure, and to make it easier to mount to a weapon system.

  • 3 5
  • |APR 11, 2014
  • |BY: , wease music

nice light,little too pricey for it.comparable others sell for about half

  • 5 5
  • |FEB 12, 2014
  • |BY: , Far out

For that price, and that power, and that many options, this is one of the best lights on the market. Stop showing off Gerber, your making the other brands blush.