...on a 1989 Sea Ray 440 Aft Cabin? I went to replace mine and found none in the light fixture! Looks like 2 bulbs, front and back, maybe festoon type?
320 Sundancer, Zodiac 290 Wave Inflatable Tohatsu 6HP, Boston Whaler 130 Sport
Engines
350 Mag V-Drive - Kohler 5ecd
Marinebeam is the one that makes them for my boat. They are much brighter than the old Festoon. They are specifically specified for the fixture on my boat. My buddy with a 450 Express has the same bulbs from Marine Beam.
2021 290 SDX
350 HP Mercruiser
Metallic blue with Sand (bar) interior
Engines
350 Mercruiser with Bravo III
It’s important to make sure they are designed for the purpose. Some LEDs are directional, and thus may not be visible from some angles as required by the coast guard.
Found some bulb info in an obscure SeaRay site. The anchor lights (2) appear to be “Perko Fig. 71” bulbs, a 31mm festoon type. And yes, making sure the replacements are bright enough for USCG Regis.