Did you know that you could shop on our www.chainreactioncycles.com/us/en website?

    • Exposure Sirius MK9 Daybright Front Light


      61 people are looking at this item.

  • Exposure Sirius MK9 Daybright Front Light

    The ideal commuter companion, this 850-lumen light by Exposure gives brilliant forward and side illumination for top visibility to other road users while illuminating the route ahead. Housed within a rugged casing, this Sirius Mk9 model excels in daylight, as well as staying durably dependable through harsher weather conditions.

    Lightweight, durable and Powerful Front Bike Light

    Featuring Intelligent Thermal Management technology to prevent the light from overheating through constant use, this easy Micro-USB-rechargeable lamp is ideal for year-round use. The Optimised Mode Selector system lets you select the ideal strength and brightness for the route ahead, with the DayBright flashing mode keeping you visible in daytime rides. Easy to mount to your bar, this excellent Exposure lamp is a top choice for the regular rider.


    Intelligent Thermal Management (ITM)

    Patented circuitry within the light will reduce power to the LEDs, if they go beyond the optimum temperature, keeping the light as efficient as possible to maximise output and battery capacity.

    Optimised Mode Selector (OMS)

    Various programs in the lights can easily be selected to offer a choice of run times and modes so you can find the right one for your ride, be it an all-night adventure or an intense blast.


    Bespoke pulse pattern designed for daylight use which is more conspicuous than a regular pulse and visible from over a kilometre away, even in the brightest conditions. DayBright mode will get you noticed. Be Seen, Be Safe.


    • Light source: 1 x white XPL2, 1 x red XPE-R LED
    • Maximum lumens: 850 front, 75 rear (up to 120 in ReAKT mode)
    • Modes: 7 front, with additional high, low and medium options within some modes, 3 rear, each with constant and pulse option
    • Run time: Front - minimum 3 hours, maximum 24 hours pulse, rear - minimum 2 hours, maximum 36 hours
    • Battery: Front - 700 mAh Lithium Ion, Rear - 2,900 mAh Lithium Ion, USB rechargeable
    • Recharge time: Front - 4 hours, rear - 5 hours
    • Dimensions: Front - 57mm x 28mm, rear - 110mm x 28mm
    • Manufacturer’s claimed weight: Front - 35 grams, rear - 84 grams

    In The Box:

    • Sirius MK9 DayBright
    • TraceR Mk2 ReAKT
    • Handlebar Bracket
    • Seatpost Bracket
    • USB Charge Cable
    • QS Guide

    Buy Exposure Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.


    • Colour: Black
  • Save 23%
    RRP £100.00
    £77.34 77.34
    Select Colour
    Email me when in stock

    Order in the next


    and choose Next Day Delivery at the checkout

  • Need help? Have a question?

    Get in contact with us

    Lights Buying Guide

    We’ve got everything you need to know in our buying guide...

Also Consider

Select Option

Please select an option

Select Option

Please select an option

Select Option

Please select an option

Select Option

Please select an option