The socket's switch turns on three ways : Low, medium or high.<br> Adaptable with incandescent bulb,3-way LED light bulb(won't light up at different illumination if you use normal LED bulb).With toggle 3 way switch,the bulb illuminate through low, medium or high lighting intensity.<br> <br> Socket end with thread diameter 3/8" which tapped for a standard 1/8" IPS lamp pipe.<br> Spider lamp shade(both harp with IP standard saddle and UNO adapter ) fit over the socket. <br> The socket shades with a harp or spider and uno shades as well.<br> <br> Electric Rating: <br> Max Voltage/Wattage:250V/250W, 18awg 2-wire screw fixing connection<br> <br> Meterial：Urea Resin and copper connector,heat Resistant up to 150deg<br> <br> <b>Reminder:</b><br> Be sure to unplug the lamp from the wall before attempting to change the socket.<br>