Rock light / onlite is full featured and double glass bulb, user friendly product, for multi-purpose use like emergency light, home decor, work, study etc. Usage: -To use the Rechargeable Bulb on electric power, move the "ON/OFF" button of the bulb towards A.C. position and plug the bulb in the A.C. power socket. To turn "ON" the bulb Push/Press the switch on the wall towards "ON" position and to turn "OFF" the bulb Push/Press the switch on the wall towards "OFF" position. -To use the Rechargeable Bulb on In-built rechargeable battery, move the "ON/OFF" button on the bulb towards D.C. position and plug the lamp in the A.C. power socket, check that the main A.C. power is turned "OFF" (i.e. Do not Push/Press the switch on the wall towards "ON" position). -Rechargeable Bulb is equipped with Automatic Light up function or Emergency function during power failure. When the Rechargeable Bulb is turned "ON" using the D.C. power and the bulb is plugged in the A.C. power socket with the main electric power "ON", the Rechargeable Bulb will not light up but instead charge the battery inside the unit and if the main electric power is "OFF", the Rechargeable Bulb will light up, this is called Automatic light up function or Emergency function. -To just charge the Rechargeable Bulb move the "ON/OFF" button on the bulb towards "OFF" position and plug the bulb in the A.C. power socket, check that the main A.C. power is turned "ON" (i.e. Push/Press the switch on the wall towards "ON" position). -There is a small RED color LED indicator near the "ON/OFF" button indicating the status of the charge. -Please do not charge the Rechargeable Bulb for more than 8 hours. Note: Please don't keep the torch incompletely discharged state, charge it at least once in two months to maintain the battery efficiency when not in use.