GU24 light bulbs do not have the usual screw base, but instead have two bayonets protruding from the base. These insert into matching holes in a fixture's GU24 socket, and twist to lock into place. Twist and pull, and the bulb comes right out of the socket. This 18 watt GU24 spiral offers 1200 lumens of light, which is equivalent to a 75 watt incandescent. Light Output: 1200 lumens (75 watt incandescent equivalent) Color Temperature: 2,700 degrees Kelvin (warm white) Color Rendering Index: 82 CRI Rated Life: 10,000 hours Manufacturer Warranty: 2 year Origin: China