Purchased several bulbs from marinebeam.com and have been very happy with products and service
. I purchased the 7 watt Edison base that will fit in the socket you posted above. Actually found out it was too bright for your application and purchased several 4 watt bulbs. These are a direct replacement of the incident bulbs 12vdc that have burned out. Price
is a little higher but our goal was to travel longer distances without running the engine
to charge the battery
banks. We've now replaced all the halogens and incidents and are now replacing the florescent. By the way the light emitted on the Edison base bulbs are warm light that is very pleasant and not the blue white of other leds.