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Old 17 September 2014, 23:11   #1
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Nav light bulb

Pre-season checks on Seawolf produced fzztpop when I switched on the white all round light on top of the A frame. I have no idea what type of light fitting it is, and there don't appear to be any identifying markings on it. The bulb is about the same size as a sidelight bulb in a vehicle, but it has two terminals on the base not one, so I've failed to find one locally (all the similar single filament bulbs in vehicles seem to be a single pin on the base) and I can't immediately see something like it online - but I don't know what you would call the bulb fitting pattern - can anybody advise please?

Secondly, the bulb is only 6 watt, and assuming it is a standard type and I've just missed it so far, I wondered what sort of wattage it is safe to uprate it to to increase visibility. I considered LED, but they seem to have issues too and I don't use it much, so have discounted that. I don't need or want to change the unit, but I wondered how many watts you could safely put in a relatively small fitting, have seen issues with melted Land Rover brake lights over the years with 21w bulbs in something that is a similar physical size, so I'm guessing 10-15w would be about the max?

Pics of the bulb and the fitting attached.

Ta
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Old 17 September 2014, 23:18   #2
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Have Lucas number for you in the morning ... Dual poles were a pita for a single filiament .... mind you Lucas don't exist anymore .. Do Dingbro vans even cover the Falklands ?
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Old 17 September 2014, 23:30   #3
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Er ... prob not!

Thanks!
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Old 18 September 2014, 17:04   #4
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I'd be much more confident in an LED than filament especially if rarely used. What is the current path? Pin>filament>pin?
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Old 18 September 2014, 19:51   #5
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oops sorry forgot .. so I googled "10-15w dual pole" and it came up with this thread .. too many forums pm me for the number if I forget ... cos clocks aint no good between you and me
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Old 18 September 2014, 21:59   #6
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Thanks, I assume the two terminals are connected to the filament and the body is electrically separate but as it is blown I can't be sure.
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Old 18 September 2014, 23:19   #7
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Yeah the 2 terminal are each end of the filament. Body is a ground I recall.
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Old 18 September 2014, 23:19   #8
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If Not using often....

Navi Light 360 deg 2nm

Battery operated, can be used as light when not being used in boat too...

S.
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Old 19 September 2014, 10:12   #9
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Still looking, but I now reckon the fitting is called a BA15D type -

https://www.google.co.uk/search?q=BA...EkQsAQ&dpr=0.9

Have found some 12 watt ones on eBay so hopefully they will turn up!
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Old 19 September 2014, 10:55   #10
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eBay? Shouldn't that be MareHarbourBay down there? ;-) (Sorry, that was bad! lol. But happy memories of 6 months down the Falklands).
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Old 28 October 2014, 08:51   #11
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Having now fitted a 12W bulb in place of the original 6W, the white all round is much brighter. That is of course stating the blindingly obvious ... but as an almost free upgrade I would very much recommend it rather than just replacing like for like.
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Old 28 October 2014, 19:05   #12
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Have you checked the wiring can handle double current? 1amp vs 0.5amps
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Old 28 October 2014, 20:49   #13
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I can recommend these. Had one for a couple of years with no issues, low power consumption, a very bright light, and no change of light fitting

http://pages.ebay.com/link/?nav=item...d=111376251458
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Old 28 October 2014, 21:09   #14
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Quote:
Originally Posted by ShinyShoe View Post
Have you checked the wiring can handle double current? 1amp vs 0.5amps
I didn't, but I honestly doubt it will be an issue unless the boat was wired up with something really puny, in which case physical durability would be as much of a concern. Typical lightweight wiring is probably good for about 5 amps.
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