Odd festoon bulbs

[wombat88]

Sorry, didn't take a pic at the time.

My early '80s boat has navigation lights lit by festoon bulbs. Theses differ from the norm in that they appear to have two lugs soldered to one end, presumably to make the fitting more secure.

Any idea what these are called and where they can be found?

 

[[70521]]

A picture is a 1,000 words.

Might be worth new fittings and LEDs if you can't find what you are looking for.

 

[Boathook]

Visit boatlamps.co.uk web site. They have a page where you select the type of bulb you have and the led replacement. Have found them very good and helpful over the years.

Edit. Replacement LED Bulb Selector

 

[wombat88]

Thanks for the info, turns out to be specific to Hella.

Hella Marine 3562 Navigation Light 12v Festoon Bulb

or LED a cool £16.99 each.

44mm 30 SMD LED Festoon Lamp: Modified for Hella Marine 3562 Series

I think I need to get a little creative with a soldering iron...

 

[Hoolie]

Indeed - I replaced all the standard festoon bulbs in our light fittings with disc smd LEDs that cost well less than £1 about ten years ago. No failures yet!

 

[William_H]

The point of the festoon filament bulb is that the filament when vertical has a very tiny source point as seen in azimuth. This then gives the very clearly defined angle of light as required by regs. This is particularly critical for masthead nav lights one bulb 3 different colors. Perhaps not so critical for individual side mounted nav lights. Even here though you will find the large area of source of light in the linked LED replacement will give a less clearly defined light radiation.
Far better are the LED side nav lights where they have an array of colored LEDs pointed only in the required direction.
12V/20M LED Port & Starboard Navigation Lights White, $50.95 | Whitworths Marine That is 25 squid or so for a pair. Cheaper than one replacement bulb. ol'will

 

[ghostlymoron]

I had these type on my Mirror Offshore. As said they are Hella Marine 3562. Replacements were difficult to obtain but I found that you can remove the prongs by unsoldering them, they can then be fitted to suitable LED festoon lamps (bulbs grow in the garden I'm told). Make sure you get the correct size lamp, 44mm long I think. I didn't solder the prongs onto the new lamps.