Quick Conversion: This adapter can easily enlarge the socket of the light bulb and quickly converts US standard E26/E27 medium screw socket to E39/E40 screw socket Easy to Install: All you need to do is just screwing it into an existing E26/E27 socket, which looks like a part of the socket. It is very easy to use and is generally used in antique floor lamp and high power HPS HID Wide Application: This adapter has a compact size and light weight, it can be widely used for E26/E27 socket lighting fixtures and E39/E40 base LED/halogen/CFL light bulbs Economical Choice: With this adapter, it can save you a lot of trouble and money of replacing your original lighting fixtures Reliable Performance: It is made of durable anti-burning material, which makes it resistant to high temperature & erosion and eliminates a fire hazard. It is suitable for max 250V, 4A, 300W
