Please note that this is the flood / neutral version of the H31 and the specs below are for the regular H31. The H31F has a frosted lens, which does a great job of smoothing out the beam and making a very nice flood light, but it greatly reduces throw. Also, is in neutral white, which gives it a warm tint.

Main Features and Specifications

• LED: Cree XP-G Neutral White (color temperature 4200 K)
• User Selectable Modes: 3 (High, Medium and Low). Each mode can be configured to one of the two sub-levels.
• Light Output
  • High:         H1 180 Lm (0.9 hrs)   or    H2  98 Lm (2 hrs) / 4 Hz Strobe
  • Medium:    M1  35 Lm (12 hrs)    or    M2      19.6 Lm (23 hrs)
  • Low:         L1   4.15 Lm (3.7 days)   or    L2   0.4 Lm (21 days)
  • Light output are out the front (OTF) values. Runtime tests are done using Sanyo 2000mAh Eneloop AA batteries.
• Voltages: 0.7V - 2.5V
• Battery: One CR123A lithium primary or RCR123 Li-ion rechargeable. Batteries are not included in the package.
• Battery Shelf Life: Over 3 years under parasitic drain
• Beam Type
  • 90° spill beam spread
• Dimensions
  • Diameter: 0.90 inch (23 mm)
  • Length:    2.57 inch (81 mm)
• Weight
  • 0.97 oz (35.8 gram)without battery or headband
  • Features
    • Electronic soft-touch switch, with a 200,000 cycle operating life
    • Smart user interface provides fast and easy access to all brightness levels
    • Precision machined casing from premium grade Alcoa aluminum bar stock
    • Durable natural hard anodized finish (Type III Class I)
    • SCHOTT ultra clear lens with anti-reflection coatings on both sides
    • Orange peel textured reflector
    • Glow In The Dark (GITD) silicone ring near the tail cap
    • Battery power can be locked out by slightly unscrewing the tailcap to prevent unwanted activations or parasitic drain
    • Waterproof to IPX8
      

  Operations

  ---

  • From Off
    • Short click turns on the light to High instantly. Click again quickly to cycle from High to Medium, and Low.
    • Press and hold to cycle through Low, Medium and High, release to set.
  • When On
    • Short click turns off the light.
    • Press and hold to cycle from Low to High, release to set. The light always cycle from Low to High regardless which level you are currently in.
    • Double click at any level to toggle and select between the two sub-levels for that level. Medium and Low selections are memorized after the light is turned off and through battery changes. H1 is not memorized.
      

   

  Accessories in the package

  ---

  • Pocket clip
  • One black silicone holder with headband
  • Two o-rings