Bayonet Products (Choose your type below)

Click on picture at right to find your base type ->

There are generally two types of bayonet bulbs found in interior fixtures:

- Double Contact (BA15D) - Single Contact (BA15S)

BA15D's are 15mm wide, and have two contacts on the bottom, and two side pins opposite one another. BA15D bulbs are also known in the marine industry as 90, 1004, 1076 and 1142 bulbs.

BA15S bulbs have a single contact on the bottom, and two side-pins opposite one another. BA15D's are also known sometimes as 89, 1141, or 1156 bulbs.

The original bulb's part numbers usually only refers to shape of glass, the wattage and voltage. For instance, the only difference between an 1142 and a 1076 is the wattage.

Many exterior navigation fixtures use a BAY15d base, which looks just like a BA15D base, but the side pins are offset, and are not directly opposite one another. This base is sometimes referred to as an 1157 type base.