This socket is used primarily for those wanting to make their own light fixtures. It is a small socket for the bi-pin incandescent bulb. 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. If you are looking for the candle socket for the bi-pin incandescent bulb, check 1023 socket.