This White LED Emergency light uses a Relay for the automatic working when power fails. When the Mains power is available, the relay allows the battery to charge and when the power fails, the relay switches on the emergency light. Too simple working ,and no complicated circuits. This Circuit is designed on request from Thomas PD.
This simple White LED lamp switches on when its surroundings turn dark. It is an ideal portable lamp in picnic sites. It uses solar power for charging the battery and an LDR for automatic switching.
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Here is a High efficiency Emergency Lamp using High bright White LEDs. It automatically turns on when power fails and turns off when power resumes. It is powered by a 6 volt 4.5 Ah rechargeable battery which can power the LEDs for a long period.
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Here is a High power White LED lamp that gives ample light in a room. It is an energy saving lamp and consumes very little power to give sufficient light. The lamp is directly powered from AC hence it is compact and easy to fix inside the switch board box.