
The product allows using a lamp with an E12 socket for a lamp with an E17 socket. Unfortunately, the rubber coating on the outside of the adapter socket makes the adapter socket too wide to fit in a standard electric candle holder. I don't recommend you do this, but I solved this problem by removing the bottom 1/8 inch of the rubber cover from the outside of the adapter socket. This slight modification allowed the e12 socket on the adapter socket to make contact with the bottom of the spark plug cartridge. Before this modification, the E12 socket was not long enough to make contact with the bottom of the spark plug.