Led bike headlight series lezyne power drive type of bulb led low battery indicator light output 600 lumen battery powered material aluminium weight 136 g usb charger modes power steady flashing dispersion 180 charging time 6 h included in delivery batteries number of bulbs 1 light duration medium 3 h light duration low 6 h light duration flashing 11 h housing colour black attachments handlebar bracket tool free power supply li ion