What are the different of 1156 ba15s and bau15s bulbs 

1156 ba15s and 1156 bau15s. What are the different and can it fit into a single bayonet bulb socket?
These two bulbs look identical in certain way, but when you look at it carefully, the pins on its base is different. 1156 ba15s has a 180° pin and 1156 bau15s has a 150° pin.
In this video, we use 12v 21w halogen bulbs. We will demonstrate the easiest way to modify these 2 types of bulbs and fit it into the socket safely and secured
There are many times we are frustrated when bought the wrong bulbs just because they look identical. Fret not, we will show you here how to modify 1156 ba15s and 1156 bau15s bulbs to work vice-versa way.
Jump to 01:18 . Pin modification for 1156 bau15s to fit into 1156 ba15s socket. This can be done the same way from 1156 ba15s to fit into 1156 bau15s socket. Follow the same steps in the video. As it is a single filmanet bulb, there won't voltage polarity concern. We can file off either pin will do.
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