TRANSFORMER: Thanks to the lamp socket, you can easily convert light bulbs with E27 sockets to E40 sockets. Assembly is simple and you benefit from great compatibility for use with many lamps! EASY TO USE: Just screw the adapter to your fixture with an E27 socket. Then you just need to use the unit with an E40 type light bulb. 4 TIMES MORE: The set includes 4 adapters. Convert several light bulbs to E27 thread for maximum light in your home! For maximum lighting at home! COMPATIBILITY: The adapter fits all light bulbs with E40 socket such as LED, halogen or energy-saving lamps. INSTALLATION Simply screw the adapter to an E27 threaded lamp and then use your E40 light bulb - and voila. COMPATIBLE WITH The adapter fits all light bulbs with E40 socket such as LED, halogen or energy-saving lamps. TECHNICAL DATA Outer connection: E27 Inner connection: E40 INCLUDED IN DELIVERY 4x socket adapter E27 to E40