... when we meeting power cut, you just open the switch on the light body, It can be continue use ... suspension and wear, light and convenient.Power Switch:AC: When the switch turn on AC ,this bulb will light ... and the battery is under recharge.OFF: When the switch turn on OFF ,the bulb just can be ... recharged only.Recharging time:6 hours.DC: When the switch turn on DC ,the bulb works from battery power ...