TRANSFORMER: Thanks to the lamp base, you can easily transform bulbs with E40 sockets into E27 sockets. Assembly is easy and you benefit from great compatibility for use with many lamps EASY OPERATION: Just screw the adapter to your luminaire with E40 socket. Then you just have to use the assembly with an E27 type bulb. 4 TIMES MORE: The set includes 4 adapters. Convert multiple bulbs to E40 thread for maximum light in your home For maximum illumination at home COMPATIBILITY: The adapter is suitable for all bulbs with E27 fitting such as LED, halogen or energy saving lamps. LIGHT EVERYWHERE With these four adapters, light up your desk lamp, bedside lamp, ceiling lamp and floor lamp. Enjoy a well-lit home INSTALLATION Simply screw the adapter to an E40 thread lamp and then use your E27 bulb - And that's it. COMPATIBLE WITH The adapter is suitable for all bulbs with E27 fitting such as LED, halogen or energy saving lamps. TECHNICAL DATA External connection: E40 Interior connection: E27 INCLUDED IN DELIVERY 4x E40 to E27 socket adapter