TRANSFORMER: With the lamp base, you can easily convert E27 bulbs to E40 bulbs. Installation is simple and you benefit from wide compatibility for use with many lamps! EASY OPERATION: Simply screw the adapter into your light fixture with an E27 socket. Then, simply use the adapter with an E40 bulb. 4 TIMES MORE: The set includes 4 adapters. Convert multiple E27 thread bulbs for maximum light in your home! For maximum lighting at home! COMPATIBILITY: The adapter is suitable for all bulbs with an E40 fitting such as LEDs, halogens, or energy-saving lamps. INSTALLATION Simply screw the adapter into a lamp with an E27 thread and then use your E40 bulb - that's it. COMPATIBLE WITH The adapter is suitable for all bulbs with an E40 fitting such as LEDs, halogens, or energy-saving lamps. TECHNICAL DATA Outer fitting: E27 Inner fitting: E40 INCLUDED IN DELIVERY 4x E27 to E40 socket adapter