Lamp adapter for converting from E40 to E27 for light bulbs, LED, halogen, and energy-saving bulbs. With the numerous lamp sockets, you do not always have the right light bulb at home-this is no longer a problem, because with our lamp socket adapters you can make your existing light bulb suitable Our set of four lamp base adapters saves a lot of time and money because the annoying search for suitable and expensive light bulbs is now a thing of the past!- Set of 4- E40 to E27- Easy installation- Compatible with LED, halogen, energy-saving lamps- Environmentally friendly flame retardant plastic With copper and nickel, you can benefit from this four-pack lamp converter and enjoy stress-free light bulb replacement in the future! Please note: To be on the safe side, you should switch off the power supply before you install the adapter!