This is a unique series of LED bulb that automatically comes on when there’s a power outage. It provides sufficient light source and doesn’t emit any form of heat. Just plug into your regular lamp holder and leave the switch on at all times. It charges when there’s electricity and automatically comes on when the electricity goes and as built-in long-lasting battery capacity for up to 4 – 8 hours when fully charged. Useful for every home, office, shops, corridors, children’s room and kitchen. Indoor use only.