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Fenix Bike Lights


Strobe Mode
750 Lumens
Ansi FL-1 Ratings Mode Output Runtime Distance Intensity Impact Resistance Waterproof
512ft 6189cdcd 1m IPX-6
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Night-Splitting On Bike Power


BT20 is out of stock until May 1st.  You may order with the expectation of this product shipping on May 1st.


When long-reach lumens matter, the BT20 rides where few can go. With both safety and freedom in mind, the DUAL DISTANCE BEAM SYSTEM gives the BT20 the potential to serve as a single-light solution for many riders.

  • Max 750 lumen output from single use or rechargeable batteries
  • Multiple brightness levels housed in an aerodynamic head
  • Simple operation including battery enclosure attachment and cabling
  • Limited Lifetime Guarantee from Fenix Light US 
Size: 2.7" (Length) x 1.7" (Width) x 2.2" (Height)
Weight: 5.5 ounce weight (excluding battery and accessories)
Accessories: BA4C battery case (for use with 4 CR123A or 2 18650 batteries -- not included), three o-ring mounting straps, extension cable, battery case protective sleeve, helmet mount
Model #: BT20T6GR

Bob Prehn
Sunday, March 02, 2014 2:02 AM
Best headlight I've had on a bike.

Bought two units so I could have one on helmet for night time trail rides. During summer months they are getting more popular in Colorado.

Also use for commuting.

Worked great on Glenwood Canyon Trail on a dark and wet night. Had great visibility in spite of wet trail as it did a great job of lighting up the path in front of me.
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