CONTINUOUSWAVE

The [miniature incandescent electric] lightbulbs are missing [from] both the [combined sidelight lamp] and the [white all-round lamp] [on a 1989 Boston Whaler MONTAUK]. I tested [for] voltage and [the lightbulb sockets] do have power.

[What miniature incandescent electric lightbulb] type and model fits in the factory sockets? Thank you!

Usually the original navigation lamps used a miniature incandescent electric lightbulb with a BA15 bayonet base. It is hard to say exactly what the lamp fixtures on your boat will use without seeing them. But the single filament bayonet base size BA15 is quite common.

I am not certain about the lightbulb model. Several owners have commented in prior postings that they thought the lightbulb was a 57. Compare at

https://www.grainger.com/product/GE-LIG ... Lamp-6VC44

I don't think the lightbulbs are particularly exotic.

An alternative that produces a brighter light output is the #67. Compare at

https://www.grainger.com/product/GE-LIG ... Lamp-6DGT1

There was some informed discussion in the past on this topic. I don't know that the model of the exact OEM bulb was ever provided. See

http://continuouswave.com/ubb/Forum6/HTML/003503.html

I replaced all my running lights on my 86' Montauk with LED's. I was able to track down a few website which sell 'super bright' LED equivalent bulbs. I am very happy with the new bulbs and the minimal use of power.

Dj