Masthead (Anchor) Light Replacement

[goodintheory]

Does anyone know the model/size/type of bulb required to replace a masthead (anchor) light on my 1986 Pearson 33-2? I'd hate to haul my girlfriend to the top of the mast to have the wrong size. . . I will probably replace the original with a LED, but I need to know what's up there to find a suitable replacement.

Thanks in advance!

 

[NYSail]

Unfortunately, they could all be different. I changed my fixture when I bought my boat as do many people so the bulbs will be different from original.

Good Luck