Exposure sirius mk9 daybright front lightthe 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'. '.strtoupper('h')oused within a rugged casing, this sirius mk9 model excels in daylight, as well as staying durably dependable through harsher weather conditions'. '.strtoupper('l')ightweight, 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'. '.strtoupper('t')he 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'. '.strtoupper('e')asy to mount to your bar, this excellent exposure lamp is a top choice for the regular rider.nright and reliable commuter lightthe perfect commuter light that crosses the boundaries of 'to see' and 'be seen' now at 850 lumens'. '.strtoupper('f')or the rider who wants a minimalist light and a high output'. '.strtoupper('a')n array of runtime options selected via the oms can cater for different rides and conditions, whilst side illumination maintains safety throughout the urban jungle'. '.strtoupper('a')lso featuring our daybright pulse pattern, this slick unit lights up the streets both day and night'. '.strtoupper('f')eatures output 850 lumens measured weight 84grams burntime min 2 hrs max 36 hrs battery capacity 2900 mah li ion dimensions mm length 110, head 28, back 28 led 1x xpl2 in the box sirius mk9, qr handlebar bracket, usb charge cable, qs guidetechnologies daybright 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'. '.strtoupper('d')aybright mode will get you noticed'. '.strtoupper('b')e seen be safe'. '.strtoupper('o')ptimised 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'. '.strtoupper('f')uel gauge using a traffic light system remaining runtime is easily monitored at a glance so you're not caught out'. '.strtoupper('t')he colour feedback is also used for mode selection, before defaulting back to runtime'. '.strtoupper('i')ntelligent 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'. '.strtoupper('s')mart port technology plus spt smart port enables the charge port to accept auxiliary accessories such as rear lights, remote switches, support cells and use your light as a power bank to charge usb devices.buy exposure accessories from chain reaction cycles, the world's largest online bike store.