Exposure sirius mk5 front lightthe 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 commuters light of choice the cnc aluminium bodywork is packed with innovative patented technologies managing power and optimising brightness features smart port technologycable free designside illuminationintelligent th