• Exposure Sirius Mk5 Front Light

        • $118.49 118.49
        • RRP $126.49
        • Save 6%

Exposure Sirius Mk5 Front Light

The Sirius Mk5 directs its 550 Lumens far and wide, lighting the path on the road to stay safe and seen. Excellent side visibility and choice of solid or pulsing modes with convenient USB charging and a quick release bracket make the Sirius the commuter’s light of choice.

The CNC aluminium bodywork is packed with innovative-patented technologies, managing power and optimising brightness.


  • Smart Port Technology+
  • Cable Free Design
  • Side illumination
  • Intelligent Thermal Management
  • Optimum Mode Selector
  • Fuel Gauge
  • USB Charging
  • Made in the UK

Technical Data

  • Run Time: 2hrs High, 36hrs Low
  • Lumens: 550
  • Battery: 2,900mAh
  • Charge Time: 4hrs
  • Dimensions: L-106mm x D-28mm
  • Weight: 81g

In The Box:

  • Sirius MK5
  • Handlebar bracket
  • USB charge cable
  • Quick start guide


USB Rechargeable: Exposure Lights incorporate USB charging for easy charging on the fly.

Smart Port: SPT+ enabled lights automatically recognise accessories allowing you to power additional front and rear lights, use the Remote Switch and charge USB devices on the move.

Cable Free Design: The primary design feature of Exposure Lights, Cable Free Design removes the hassle of cables and straps utilising the superb range of brackets for speedy, rock solid attachment.

Fuel Gauge: Exposure Lights Fuel Gauge technology accurately displays battery power and burntime information so you can see how long you have left to ride.

Buy Exposure Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.

  • Delivery costFREE
  • Delivery toUnited States of America
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
  • Pay by Bank Transfer, PayPal or Card


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