Fenix SD20

Fenix SD20 - 1000 lumens - CREE XM-L2 U2 LED & XQ-E LED - 18650 x2 or CR123A x4

  • 10995
  • Save $ 1600

The SD20 is an upgrade to the SD10, Fenix's first diving light. With this one, you can take it down to 100 meters below the water's surface and have full control over the light with the orange magnetic ring. The highest white light is 1000 lumens out to 172 meters outside the water, while the red LED shoots 105 lumens out to 73 meters.

The SD20 is machined from aircraft-grade aluminum and hard-anodized, with a tough and clear glass lens that's anti-reflective and won't scratch easy. The tailcap has a larger hole to allow a connection to a diving suit or harness. 2 18650s or 4 CR123As are used in sequence, with a conducting plate included in every purchase if your 18650s are flat-tops.


  • Uses Cree XM-L2 U2 and Cree XQE Red LED with a lifespan of 50,000 hours
  • Rotating magnetic ring for one-hand control
  • Double-layer body tube guards against corrosion
  • Integrated white and red light illumination
  • Digitally regulated output maintains constant output
  • Intelligent over-heat protection to avoid high temperature of the surface
  • Low-voltage warning reminds when battery replacement is needed
  • Reverse polarity protection, to protect from improper battery installation
  • Tailcap with big buckle for fast and convenient quick draw
  • Made of durable aircraft-grade aluminum
  • Premium type III hard-anodized anti-abrasive finish
  • Toughened ultra-clear glass lens with anti-reflective coating


  • Output modes:
    Low: 400 lumens/7hr 30min; 354ft (108m); 2900cd
    High: 1000 lumens/3hr; 564ft (172m); 7400cd
    Red: 105 lumens/8hr; 240ft (73m); 1300cd
  • Impact resistance: 1m
  • Waterproofing: IPX8, underwater 100m
  • Dimensions:
    Length: 8.2” (208mm)
    Diameter: 0.1” (26mm)
    Head: 1.6” (40mm)
  • Weight: 8.6oz (245g)(excluding batteries)
  • Batteries: 2 18650 rechargeable Li-ion batteries or 4 CR123A Lithium batteries
  • Included: Lanyard, spare O-ring, conducting plate* (*Put between batteries with flat-tops)

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