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 the fixture's socket, and twist to lock into place. Twist and pull, and the bulb comes right out of the socket. This 23 watt GU24 spiral offers 1600 lumens of light, which is equivalent to a 75 to 100 watt incandescent. Light Output: 1600 lumens (75-100 watt incandescent equivalent) Color Temperature: 2,700 degrees Kelvin (warm white) Rated Life: 10,000 hours Manufacturer Warranty: 1 year Origin: China