Just pull out the bulbs and see if there is a number stamped on the base or lens. Otherwise just take it to the auto store and match up the base/plug. Sylvania makes a great line of LED replacement bulbs they call ZEVO, they are available in about 25 different sizes.
I can't get at the boat right now, it's in dry storage and up in the air. I was trying to find out what size so when I get it out I can replace them at the same time.
I think the lights are ITC docking lights with 35 or 50 watt halogen bulbs. I replaced my bulbs with Sylvania LED's. Would like to upgrade to new complete LED docking lights as they have lights that shine to the side as well as ahead. Replacing LED bulbs was a big difference though. See attachment.
Just replaced the bulbs in my 04 and when I pulled old bulbs out to order they're 12V 50W EXT. I ordered the same thing to put back in but should have went with LED.
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I think the lights are ITC docking lights with 35 or 50 watt halogen bulbs. I replaced my bulbs with Sylvania LED's. Would like to upgrade to new complete LED docking lights as they have lights that shine to the side as well as ahead. Replacing LED bulbs was a big difference though. See attachment.
http://www.overtons.com/modperl/product/details.cgi?pdesc=ITC-Hull-Mounted-Halogen-Docking-Lights-Pair&i=773111