[. . . ] Photon High Output Twin Headlight System Owner's Manual Thank you for purchasing a Photon H. O. This light system is constructed of the highest quality materials, such as cold-forged aluminum housings, heavy duty cords with strong positive-click connections, and halogen bulbs with dichoric glass reflectors. [. . . ] Once the headlamp is attached, check to ensure the mount is secure enough that it will not move on the bar during trail and road vibration, or over large bumps. For technical support, call 1-800-888-2710, M-F 9am-6pm EST Assembled in USA Bike Nashbar, 6103 Rt 446, Canfield, OH. Connect the battery cord to the light cord, and snap the cords firmly together. Excess cord should be wrapped around the frame or tucked into the battery pack to prevent entanglements. To operate: The switch at the back of the headlamp housing controls each lamp. The headlamps can be operated independently of one another to conserve battery power and extend battery run time. Bulb Replacement ­ Read Carefully! Take care when replacing the bulb to avoid damaging the bulb connection. Ceramic Socket Top Tube Lens Cap Down Tube Bulb Assembly ONLY ONE LAMP SHOWN FOR CLARITY Fig. Loosen the bolts which secure the headlamps to the base, rotate each headlamp until aimed properly, and then securely retighten the assembly bolts. To remove the headlight assembly from the handlebar mount, push the tab at the front of the bracket upward, and slide the assembly backward until it is free of the handlebar mount. !It may be necessary to press down gently on the bulb lens while unthreading the cap. To install the bulb, first insert the two prongs of the retainer clip into the larger holes on the ceramic socket. Next, insert the bulb lead wires into the smaller holes in the socket. [. . . ] battery charger contains a trickle charge feature which allows the battery to be left on recharge indefinitely without harm. Once the charger switches to trickle mode, it must be unplugged from the wall outlet before a new charge cycle can begin. [. . . ]