FUCHW provide auto lamp OF car led lights sockets:

1: fuchw compay kinds of car led lights sockets as followed:
car led bulbs sockets wedge / B8.3D / B8.5D / BAX / BA9S / BAX9S / 1156 (BA15S) / 1157 (BA15YD) / 7440/7443/3156/3157
(each car led bulbs socket has linked to each respective page in the website www.fuchw.com , and the socket of LED festoon light and fog light will introduce next time)

2: fuchw company use of different car led lights are corresponding to the sockets:
Indicator / signal: Wedge
Reverse / back-up light: BA9S / BAX9S
Dashboard lights: Wedge / B8.3D / B8.5D / BAX
car led bulbs of Turning lights: 1156 (BA15S) / 7440/3156
car led bulbs of Brake light: 1157 (BA15D) / 7443/3157

3: How to distinguish the familiar car led bulbs sockets:
   (1) car led bulbs sockets 1156 (BA15S = BS) and car led bulbs sockets 1157 (BA15Y = BY)
car led bulbs sockets BA15S (BS, 1156) has a contact (round), generally used for turning lights.
car led bulbs sockets BAY15D (BY, 1157) there are two contact (circle / crescent), the level of the foot, generally used for brake lights.
car led bulbs sockets 1156,1157 mainly for European and American markets (crescent), the circle contact generally used in Korean.

Below is the picture :

(2) car led bulbs sockets 3156 and 3157
The car led bulbs difference between 3156 and 3157
3156 has two Antennas (iron), generally used for turning lights.
 3157 has four Antennas (iron), are generally used for brake lights.

(1156/1157 are mainly used in Europe and American markets)

(3) car led bulbs sockets 7440 and 7443
  7440 has two Antennas, are generally used for turning lights.
  7443 has four Antennas, are generally used for brake lights.

7440/7443 mainly for the Japanese market

if you want to know most info , pls send mail to me : helen@fuchw.com