Convertible: With the lamp base you can easily convert fixtures with a GU10 thread to an E27 socket and use bulbs with an E27 thread on a GU10 base. How it works: Simply twist the socket adapter into your lamp with a GU10 socket. Then you can comfortably use the E 27 fitting for all bulbs of this format. Versatile: thanks to the total of 3 bulb adapters, you can convert several of your bulbs with a GU10 thread in bulbs with an E27 socket. Compatible with all E27 bulbs such as LED, halogen and energy saving bulbs, also with Smart Home systems and can be used with all table lamps , floor lamps, Assortment: our extensive offer also includes numerous light bulbs and lamps.