Crompton 12W Emergency LED Bulb provides cool daylight brightness at 6500K for clear and comfortable visibility. Each bulb features a built-in rechargeable battery offering up to 4 hours of backup during power outages. The inverter technology ensures seamless automatic switching to emergency mode when electricity fails. With built-in surge protection, these bulbs are safeguarded against voltage fluctuations for dependable performance. Their durable design supports long-lasting use in everyday and emergency situations. Equipped with a standard B22 base, this pack of 2 bulbs offers easy installation and consistent emergency lighting for homes.