1. To use the rechargeable bulb using the in-built rechargeable bulb towards "DC" function. 2. To turn "ON "the rechargeable bulb push/press the switch on the wall towards "ON" position and to turn "OFF" position. 3. Charge the rechargeable bulb once in every 2 months if the rechargeable bulb is not used continuously for 2 months. 4. To use the rechargeable bulb electric power moves the on/off button of the rechargeable bulb towards the "AC" function and plug into the socket. 5. There is a small red color LED indicator near the ON/OFF button indicating the status of the charge. Do not charge the unit for more then 12 hours at one time. 6. When rechargeable bulb is turned "ON" on "DC FUNCTION" and plugged in to the socket and if the electric power is "ON" it will charge the in built battery but rechargeable bulb will turn "OFF" then the rechargeable bulb will turn "ON" by using the power from the in built battery this is called automatic emergency lamination function (AEIF).