Light & Motion HID Arc Li-Ion Ultra Headlight Systems

"These headlights are the kings of the light jungle! With a super-bright HID bulb coupled with lightweight and advanced battery technology both systems set the standard for serious cyclists and the 24HR rider. The Arc Li-ion system features an incredibly light and compact 330-gram lithium ion battery, which provides up to a 3-hr burn time at 13.5 watts/675 lumens and 3.5hrs at 10-watts/550 lumens low beam. The more advanced Arc-Li-ion Ultra system increases the burn time to 5-hrs at 13.5-watts and an incredible 6-hrs at 10-watts, and the 9 cell lithium ultra battery adds only 145g. The amazing 475g battery is half the weight of comparable systems. Both systems include handlebar and helmet"