Bulb ID

[Ihavenojob]

My daughter needs some bulbs to go on her boat, she took one to an electrical store, but they were stumped. Can anyone ID this bulb? Not sure if it should have a glass cover, I would have thought it would. It's 35mm tall, bayonet pins are symmetrical, there are 3 LED's on the top, and 5 around it.

 

[Murdochcat]

That looks like a standard BC connector

I’m guessing the boat is 12v

 

[Scally-Ho]

A straight forward bayonet cap with eight surface mounted diodes, but I could not tell you the size of the cap or the operating voltage as there is nothing to compare it with.

 

[333rocky333]

Is there anthing stamped on the silver bit, there often is, if she has other lights on the boat there may be ,markings on them or on the cover/glass of them

 

[Harry Bloomfield]

It will either be 12 or 24v, on a boat. For the actual voltage, you will either need to look at the habitation batteries, or check the base of another such lamp. You could do likewise for the wattage, but I would make a guess at 5watt. If the new lamp doesn't work when plugged in, try rotating it in the socket, 180 degrees.

And - yes, the cover/diffuser is missing, that might have had the bulb rating on it.

 

[Scally-Ho]

When I owned an ex RN Nelson class all the lighting was 48v. Are the pins on that lamp cap staggered?

 

[Ihavenojob]

There are no markings on it whatsoever, the base is 15mm diameter, she has only just got the boat so she has no idea of voltage. Apparently all the lights on one side of the boat don't work, so possibly a circuit fault.

 

[Murdochcat]

Have you checked all the fuses

 

[Rodders53]

Need to dig out the manuals and any wiring diagrams for the boat. Find all the breakers and fuses and check.

A multimeter will be an invaluable tool to have / learn to use.

NB I'd not bet on there being any cover / diffuser missing https://www.sunshinesolar.co.uk/Item/BA15DBW-2 looks very very similar to my eyes.

 

[Harry Bloomfield]

Apparently all the lights on one side of the boat don't work, so possibly a circuit fault.

Yep, I wouldn't bother chasing a new lamp, until at least some lamps work on that side. Borrow lamps, from the working side, to double-check. Each side, might be separately fused, and the fuse blown.

 

[Ihavenojob]

Her other half used to be an electrician, I think I now know why he gave it up.

 

[ericmark]

Try here https://www.bedazzledledlighting.co.uk/ they specialise in boat and caravan, bulbs, typically 10–30 volt DC. It is a BAXXd where XX is mm diameter, typically 15 or 22 but from picture can't tell.

 

[Tricky-Dicky]

I would go to any Caravan outlet and ask their parts dept if they recognise the bulb and/or can recommend a replacement.
It looks to me like a 12 volt bulb.

 

[Harry Bloomfield]

It looks to me like a 12 volt bulb.

I agree, a caravan place would be able to supply the bulb, if 12v, but I certainly would not risk making an assumption about the voltage - that needs to be established first....

The OP has only mentioned it's a boat, and it has several lights at each side - that suggests perhaps a narrow boat, and so likely 24v.

 

[ericmark]

BA15D 18 LED Tower bulb and are suitable for both 12v and 24v DC systems whilst maintaining consistent brightness during charging and load fluctuations.

The link is here, Voltage: 10v - 30v DC so does not matter if 12 or 24 volts.

My son's narrow boat was 12 volts.