This high performance light set is ideal for all journeys, either urban commutes or rural unlit roads. The Meteor Vortex supplies you with 600 lumens of light, and 8 different modes with run times varying between 90 minutes and 52 hours, in comparison to the Comet X, which fires out up to 50 lumens which can last up to a maximum of 19 hours. As well as having side visibility, these powerful lights are water resistant ensuring you can ride in all weather conditions without worrying about the damage. The Meteor and Comet X both include the Dayflash Mode which enables you to be visible during the day, making it a perfect every day light set. A Memory Mode function is also installed which remembers the last mode the light was on, prior to switching off on your last ride.Mode memory function. USB Rechargeable. Day flash mode.