Emergency Bulb with Internal Rechargeable Battery Backup for up to 12 Hours, Energy-Efficient LED, 8 Watts, 3000K Temperature Rating

Installing the bulb is as simple as twisting it into your light socket. When
powered, it operates in a Fixture High Mode, emitting a brilliant 850 lumens. In
the event of an outage, switch to the Backup Mode and choose between
Backup High, Medium, or Low, providing 500, 185, or 80 lumens respectively.
The bulb comes with a power cap, transforming it into a portable handheld
light, while the integrated hanging hook allows for versatile placement options.