1156 BA15S vs. 1156 BAU15S|What is different between them?

1156 Single Socket Bulbs Come in 2 Common Varieties: BA15S and BAU15S

Choosing the right specification is crucial, or you might find yourself unable to install them!


1156 Straight: Officially known as BA15S
Different wattages may have alternative names; for example, a 21W turn signal bulb is also called P21W.

1156 Angled: Officially known as BAU15S
Different wattages may have alternative names; for example, a 21W turn signal bulb is also called PY21W.

 

How to Differentiate by Appearance:

A. 1156 BA15S:
Two raised points are 180 degrees apart.

B. 1156 BAU15S:
Two raised points are 150 degrees apart.

Refer to the diagram below for a visual comparison:"

Q&A

Q1. What should I do if I bought the wrong base?
For perfectionists, we recommend exchanging it for the correct base.

If you're not too concerned, you can simply grind down one of the raised points; it won't affect its functionality.
 
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About HYUGA

HYUGA, a LED bulb and part brand by Per-Accurate Inc., is dedicated to connecting people and the promising LED industry to the future.