Preon P1 MKIII


Out stock

The third time is the charm (This pre-production run is sold out)

introducing the third generation Preon P1 MKIII, the most refined Preon ever

(1) AAA



50 hr

1 hr


A Foursevens staple: the third generation Preon P1 MKIII is AAA battery powered and surprisingly bright. With a brand new interface, the Preon gives you versatility without cluttering your flashlight with unneeded modes. Want more options? The Preon has six re-configurable user interfaces ranging from a single maximum-output mode to having all six distinct modes ready for quick access. You can set the light to be as simple or as complex as you need it. Great things do come in small packages.

What's new with the Preon P1 MKIII

This batch of lights is a prototype run and the first Foursevens launch under the Prometheus banner. We only made 125 lights in each finish and they feature both the Foursevens and Prometheus logo. Production lights will only have Foursevens branding. Here are the major changes: 

  • User interface: a similar to the previous UI but revamped for better usability and wider appeal to different owners. Details below. 
  • Pocket clip: The previous Preon clip was actually patterned after my legendary Prometheus clips. We took that a step further and made it an exact copy out of stainless steel. This clip is substantially thicker than previous Preon clips and has better ergonomics. 
  • Body Machining: I opted to remove the grooving from the area underneath the clip to prevent the light from tearing up your pockets. 
  • Tail Cap: Accidental activation plagued both previous generations of Preons. The new rubber button solves this issue while remaining functional and feeling solid. 
  • Nichia LED: You already know that I'm focused on usable light over maximum lumens. From now on, all Preons feature the lauded Nichia 219C in order to deliver solid output ad 92+ CRI (Color Rendering Index). The Preon never looked so good! 
  • Tailcap Switch: The switch is a brand new low-resistance model that allows the Preon to match the lumen output of previous lights (100+ lumens) yet deliver High CRI. 
  • Hybrid Memory: A blend of memory and no-memory, the hybrid configuration saves the last mode used, but reverts to the first mode in the sequence when shifting out of a saved mode. 

Pre-Production Test Finishes

The primary reason for this pre-production run is to test new finishes in a production environment. If people aren't willing to pay more for PVD, we'll have to go back to anodize. It's likely that 1 or more finish will get dropped on production lights, so this may be your only chance ;)

  • Electroless Nickel plating is a Prometheus trademark. It's an engineering coating that is durable, conductive, and coats 100% of the light, inside and out. This leaves zero bare metal exposed to corrosion. 
  • CR3 (Tri-Chrome) + PVD (Physical Vapor Deposition) CR3 provides similar benefits to EN, but it is more suitable for receiving the subsequent PVD coating. The color is bright silver, so I don't prefer that on lights that won't see PVD. PVD coatings are extremely awesome, and equally expensive. As you know, I can't stand anodizing because you have to machine away the anodize (an electrical insulator) in order for the light to conduct electricity (actually operate). Here's the thing: the only place you really want coating (to prevent oxidation) is on the parts that conduct electricity! PVD is the only way to get a black light that is 100% coated. 

    Coating options

      • Polished EN: polished + Electroless Nickel
      • Satin EN: Bead blasted + Electroless Nickel
      • Tuxedo Black: polished + CR3 + PVD 
      • Satin Black: bead blasted + CR3 + PVD

      new user interface

      Preons are initially set to Configuration 3 with Medium and High. They can be reconfigured as often as you'd like.

      Entering Configuration Mode: Just power cycle (on/off) the light 10 times in <3 seconds to enter configuration mode. The light will blink a number of times corresponding to the current configuration. One power cycle will change to the next configuration. Leave the light off for 5 seconds to save the current configuration to memory. 

      When entering configuration mode you should use a "press" and not a "click." A button press will activate the light in momentary mode. A click is audible and latches the light in the "on" state. Basically clicking is too slow and pressing allows faster on/off cycling :)

      • Config. 1: Max
      • Config. 2: Max - Strobe
      • Config. 3: Medium - High + Burst
      • Config. 4: Low - Med - High + Burst
      • Config. 5: High - Med - Low + Burst
      • Config. 6: Low - Med - High - Strobe - SOS - Beacon + Burst


      • Low (Moonlight) = 1 lumen
      • Medium = 15%
      • High = 60%
      • Max = 100%
      • Burst = 100% (enter burst with 2 fast cycles from any mode) 
      • Strobe = 100% @ 20Hz
      • Beacon = 100% double blink every 5 seconds 

      What's up with burst mode? : This feature is ported over from the flagship Prometheus Alpha Flashlights. It allows you to access maximum output at any time without scrolling through other modes. This also allows you to have maximum output when you need it, but conserve battery by using the standard high mode (60% output) for normal use. 


      • Rechargeable NiMh AAA battery included
      • 92+ CRI (Color Rendering Index) 
      • Invisible High Frequency PWM (yes really) 
      • Burst Mode = no memory
      • Burst Behavior = 30 seconds burst, ramp to 60% over 30 seconds
      • Digital Bump Protection = no accidental mode changes
      • Enter Configuration Mode = 10 cycles within 3 seconds
      • Memory Function = Hybrid: memory + reverts to mode 1 when shifting out of a saved mode
      • Water Resistance = IPX8


      Alkaline batteries will power the Preon, but we strongly discourage their use. Alkaline batteries leak and/or produce corrosive gas during use. This will destroy your flashlight. Every Preon ships with an included rechargeable NiMh battery. You can purchase additional batteries and chargers through this link.  

      • Full power for the life of the battery: Alkalines lose power as they run down.
      • They don't leak: and you know alkalines leak and ruin your stuff all the time.
      • ReCyko+ lasts for more 1000 charges: One battery vs. 1000 alkalines!
      • Low Self Discharge: 80% charge retention at 6 months
      • The best option for flashlights: or any device for that matter.
      • Same performance as expensive lithium disposables: without the waste.
      Dimensions Length: 3.4 in
      Diameter: 0.57 in
      Weight: 0.62 oz
      LED Emitter Nichia 219C (SM403) 4000K 92+ CRI
      Voltage range 0.9V-3V
      Spot Beam Angle: 22.6 degrees;Diameter at 3 meters: 1200mm
      Flood Beam Angle: 84 degrees; Diameter at 1 meter: 5400mm
      Brightness Levels Estimated (Under Review)
      Low: 1 lumen, 50 hrs
      Medium: 15 lumens, 4 hrs
      High: 60 lumens, 1 hrs
      Max: 100 lumens, .5 hrs-
      Burst: 100 lumens, .5 hr
      Special Modes Strobe (20hz): 2 hrs
      SOS: 3 hrs
      Beacon: 7.5 hrs
      Reflector Textured
      Body Material Electroless Nickel or CR3+PVD over 6061-T6 Aluinum
      Bezel Material Electroless Nickel or CR3+PVD over 6061-T6 Aluinum
      Lens Material Optical-grade glass lens with anti-reflective coating on both sides
      Water Resistance IPX8
      Included Accessories NiMh Rechargeable Battery
      Where it's Made

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