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LED Conversion Head

KX4 LED Conversion Head -- view 1

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President, Lynes Home Inspections

The new LED light for my Surefire is very bright and has dramatically increased the battery life. I use it daily with extended burn time in attic and crawl spaces.

Reviewed by Mike Lynes (Posted on 12/11/13)

Works great but overpriced

I was very happy with my KX4 conversion when I first installed it. I was looking for a extremely bright and long life beam and I liked the specs of the KX4. It seemed quite pricey but I was happy with my previous SureFire lights and assumed that was the price of entry for a 120 lumens light. A few days after I received my KX4 I noticed that Home Depot sells a 212 lumen flashlight that uses alkaline batteries for <$50. Even though the SureFire quality is likely higher, I felt duped paying so much for 120 lumens.

Reviewed by Franca (Posted on 11/11/13)

KX4 Conversion

Used this conversion to upgrade my old, old G2Z from incandescent to Led. Instead of new batts every 20 mins from a comparatively much less powerful bulb, I get 2-3 hours...big gain in power, big savings in dollars. As one whose life literally depends on my Surefires, the price is worth it. How much is your LIFE worth? On the two occasions, over 20 years, that two overworked caps stopped working, Surefire never whined, sniveled, or complained. I wrote them, they sent me replacements. Period. End of story.As a secure voice radio, rucksack humping Screaming Eagle in Vietnam on both my tours, I would have paid $500 each for an iPhone 5, two Surefires, and counted myself fortunate when I had to change codes every zero dark thirty zulu on the KY38. Surefire, thanks, no complaints, whining or sniveling. well done and carry on. My life is worth your gear and I have two EDC Surefires, as well as 2 handguns. Redundant safety equipment. Habla Murphy?

Reviewed by Randy Malorin, SFC, USA (Ret) (Posted on 10/24/13)

KX4 LED Conversion Head

Bought this light to replace the P61 bulbs I had been using in my light. The new light is brighter, consumes less battery life than the old incandescent, which is important to me given the cost of the batteries. Not a cheap fix to improve P61 performance parameters but a good long term investment if you plan to keep your light like I do.

Reviewed by Mark K (Posted on 10/21/13)

Great Update to my Flashlight

Works very well. Improved battery life and brighter light too.

Reviewed by Borgrd (Posted on 10/14/13)

Simple but Expensive Upgrade

The KX4 LED conversion head conversion was simple and straightforward and resulted in a flashlight that is considerably brighter with a noticeably reduced consumption of batteries. The quality and craftsmanship are first-rate but at $85.00, I had every right to expect it. I would have purchased and installed the conversion kit a long time ago but it took me several months to convince myself that it was worth it to spend $85.00 to upgrade to my existing flashlight versus buying a competitors complete new flashlight for a lesser price.

Reviewed by GMO-Houston, TX (Posted on 10/13/13)


If you need extra light to see into small recesses or in daylight this is the light for you. Normal lights wash out in sunlight, not this one. Ever try to check battery fluid in your car in daylight. It is very difficult. With this light it is a snap. I use it when working on small mechanical devices. I can pick out part numbers and detect hidden problems. I almost didn't buy it because of the cost but after using it in my shop; I wouldn't be without it.

Reviewed by Ralph M (Posted on 10/12/13)


I was hoping for a brighter beam ,, but otherwise it's ok

Reviewed by robert carroll (Posted on 10/12/13)


This conversion head does exactly what I wanted it to do, increase the light out put of my surefire 6P light. It is attached to my home defense shotgun.

Reviewed by Bill Mc (Posted on 10/12/13)

Elevator tech.

I am disappoint in the LED light. My light with the original bulb was bright and reliable , after buying the LED it would not always work. I had to play with it, and take it apart and bend and clean the contacts. I still have the light, but I bought a new (different brand) light that I carry everyday for work.

Reviewed by D. Doyle (Posted on 10/12/13)


Max Output -- White Light120.0lumens
Bezel Diameter1.25inches
*Runtime until output drops below 10% of maximum output


The KX4 LED conversion head changes the maximum output of two-and three-battery SureFire flashlights to 120 lumens, and serves as an LED conversion/upgrade for SureFire incandescent flashlights equipped with P60 or P61 incandescent lamps. Features an aerospace aluminum bezel in a variety of colors and finishes; a precision micro-textured reflector that creates a smooth, flawless beam; and a high-efficiency LED emitter with no filament to burn out or break. Simply remove the bezel and P60 or P61 emitter currently installed on the flashlight and screw on the KX4 LED head to convert.

Any finish and/or color KX4 LED head can be used on any SureFire flashlight equipped with a P60 or P61 emitter. However, for the best match pair flashlight and KX4 version as follows:

- C2L Hard Anodized – order KX4 in Hard Anodized

- G2L, G2L-FYL, G3L, G3L-FYL and G2ZL in Black – order KX4 in   Black Hard Anodized

- 6PL & Z2L in Black – order KX4 in Black Anodized

- G2L, G3L & G2ZL in Tan or OD Green – order KX4 in Tan or OD     Green

- G2 in Yellow – order KX4 in Yellow

  • Max Output: 120 lumens; Tactical Runtime: 2-3.3 hours, depending on flashlight model
  • Virtually indestructible LED regulated to maximize output and runtime
  • Precision micro-textured reflector creates smooth, optimized beam
  • High-strength aluminum construction; weatherproof O-ring and gasket sealing
  • Powder coated, Type II anodized, or Mil-Spec Type III hard-anodized finish for extreme durability
  • Weatherproof O-ring and gasket sealing
  • Backed by SureFire's No-Hassle Guarantee

Related Information

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SureFire is Designed and Built in the USA