Where to get bulb for rear navigation light?

[jhodgski]

My narrowboat has a white light on the back. Unfortunately, the bulb for it broke so I am trying to find a new one but am having no luck (having searched online and in Halfords).

The bulb should have a metal cap on each end but, as you can see from this photo, one cap is missing (lost):

https://www.dropbox.com/s/ubop992r9rrny0r/20170430_181650.jpg?dl=0

The bulb is approx 40mm long and the caps are concave at the end - as you can see here:

https://www.dropbox.com/s/15esgfnxtjkqfy2/20170430_181710.jpg?dl=0

Does anyone know what this type of bulb is called / where to get one from?

Thank you,

James 

[Mac of Cygnet]

Well, they are called festoon bulbs, but  most don't have concave ends.  This LED one does though.

More here 

Edited April 30, 2017 by Mac of Cygnet

[Glynn]

https://marinestore.co.uk/Merchant2/merchant.mvc?Screen=PROD&Product_Code=JHR950&Category_Code=light-bulbs&Store_Code=mrst&gclid=CjwKEAjwlpbIBRCx4eT8l9W26igSJAAuQ_HGPPOq6x-TktcFj1TmIBXj9yilRo8GIIZyuP9ysjbnGBoCN-bw_wcB

 

[mross]

Can you see the maker's name on the light fitting?

Edited April 30, 2017 by mross

[Detling]

To meet the collision regulations you cannot simply replace a incandescent bulb with a led bulb as the angles of beam will be wrong and maybe the visible distance will be shorter.  

For a side light expect the brightness to be totally wrong as led (even white) have very narrow colour spectrum peaks which are unlikely to coincide with the coloured filter pass bands.

If your navigation lights were supplied with led bulbs you will need identical replacements to maintain the certification.

[Alan de Enfield]

44 minutes ago, Mac of Cygnet said:

Well, they are called festoon bulbs, but  most don't have concave ends.  This LED one does though.

More here 

The problem is that LED bulbs in 'filament bulb fittings' do not comply with the regulations and will invalidate your insurance.

You can only use LED bulbs in purpose designed LED Navigation light fittings.

 

It may well be that you do not need navigation lights (if on a canal) - however if you are on waters that do need them then they MUST comply.

 

The Maritime and Coastguard Agency (MCA) has issued a Guidance Note highlighting these problems, and a warning not to use LED white replacement bulbs in equipment designed for filament bulb use.
 

[jhodgski]

Thanks for the replies. I'll go with the Marine Store (non-LED) bulb as that works at at about half the price of the Sheridan Marine bulb after they've add their hefty p&p charge on.

[Onewheeler]

As you'll only need nav lights when moving there is little point in using leds other than for the longer life. LED might be better for the anchor light.