• Phase 850
  • Phase 850
  • Phase 850
  • Phase 850

Phase 850

850 lumen rechargeable bike light


Light up your night time two-wheeled adventures on and off-road: an 850 lumen rechargeable bike light with 5 lighting modes and a +200m beam distance.
  • Color
  • Check availability in store

Pre-order now for despatch from . We'll keep you up-to-date with your order progress and despatch as soon as it is available.

  • Free Delivery over £50

  • Free Returns

As the Phase 850 is especially designed for easy-going gravel paths, canals, and short singletrack trails, it is perfectly suited to the gravel rider. The 85-degree beam angle means you can see the journey ahead, as well as be seen by oncoming traffic or the local gravel gang.

  • >200m beam distance for dusk riding
  • Up to 18 hours of battery life
  • Memory lighting: the light defaults to the most recently used mode upon restarting

The light boasts 5 modes: high, mid, low, pulse and strobe. In high mode, the Phase 850 lasts 1hr30mins – just enough time for your local mid-week, pre-dinner loop. On the other end of the scale, the 100-lumen pulse mode lasts over 18 hours! No matter your journey, Phase 850 can adapt to your trail.

It’s got good memory too: the Phase 850 remembers your most recently used mode and defaults to it the next time you turn it on. Once you’ve finished shredding up the local gravel, don’t forget to recharge your light. It just needs a handy USB-C cable to be ready for when you’re next raring to ride.


Product overview

  • >200m beam distance for dusk riding
  • Up to 18 hours of battery life
  • 5 lighting modes: high, mid, low, pulse and strobe
  • Rechargeable with USB-C cable
  • Versatile: attach to handlebar, helmet or cockpit mount
  • Light, yet durable at just 130g
  • Memory lighting: the light defaults to the most recently used mode upon restarting
  • 3 year Alpine Bond

Technical details


101 x 34 x 29mm




Alloy 6063; IPX6 waterproof

Beam distance



2500mAh 3.7V Li-ion rechargeable




High: 850 lumens, 1hr30m;
Mid: 400 lumens, 2hr30m;
Low: 200 lumens, 4hr30m,
Pulse: 100 - 50 lumens; 18hrs,
Strobe: 850 lumens, 5hrs

Sustainability and Product Care

Product care information

Lithium-ion batteries do drain over time so make sure your light is charged before use. Avoid using fast charge power supply as this may cause overcharging. The Phase charges best with a 5V/2.0A micro USB input. Wipe clean after use and store fully charged in a cool, dry place. Don't machine wash, that would be daft.

We have dedicated Repair Stations in our stores and we're fully equipped to breathe new life into your old kit. This includes spare parts, patches, new zips and wash and reproofing of your down and waterproofs. Pop into any store or contact us online for more info.

Alpine Bond
If one of our products does not meet your expectations upon delivery, or if during its lifetime does not live up to the demands placed upon it, please return it to us for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction. If it’s your fault then we will help out the best we can. Find out more about our Alpine Bond here.


This bike light is built to last with a hardwearing case and a non-disposable battery, reducing waste and meaning you can love your product for longer!

Add a little something else

Front facing aluminium mount fitting a Garmin® and Alpkit bike lights

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