3/8" candle socket with 12" white wire leads. The socket is for a bi-pin incandescent bulb. Perfect for designing your own candle stick chandeliers using bi-pin incandescent bulbs. If you are wanting to use LEDs, you should look at the small screw-base socket 1024. You can then purchase one of the LED screw-base replacement bulbs we offer. Check out 520 series or the candle 522 series.