TRANSFORMER: Thanks to the lamp base, you can easily convert bulbs with E40 sockets into E27 sockets. Assembly is easy and you benefit from great compatibility for use with many lamps! EASY OPERATION: Simply 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 lighting at home! COMPATIBILITY: The adaptation is suitable for all bulbs with E27 fitting such as LED, halogen or energy saving lamps. OUR RANGE: Our offer includes many other electronic devices including bulb adapters of different types. Take a look!