COMPATIBILITY: Standard E27 screw base fits most common household light fixtures and lamps worldwide SOCKET TYPE: Edison screw (E27) base with 27 millimetre diameter threading for secure installation VERSATILE USE: Suitable for various indoor lighting applications including ceiling fixtures, table lamps, and floor lamps INSTALLATION: Simply screw the bulb clockwise into any compatible E27 socket until firmly secured DIMENSIONS: Features standard E27 measurements with 27mm base diameter and industry-standard threading pitch