Originally Posted by Madwand
Already returned them and given up. One of them was a 110-volt bulb, same thing applies?
Correction: one of them was a 110v AC
In truth, neither of the bulbs you bought was suitable for 12v in boats (the CAN-bus 12v one might have worked; the 110v AC one would only work in a 110v AC fixture). I suggest you open all your boat light fixtures, write down what type of incandescant bulb is already in there, then take that list to your favourite marine
store/chandlery and see what they have for LED replacement. Not every incandescent bulb has a direct replacement, in some cases you might have to try the nearest alternative or replace the fixture.