Thanks Rod on the info for a SMD, I've seen them but never knew what they were called. Len

Sorry no photos yet just forward planning

SMD = Surface Mount Device, that is, a chip LED, transistor, capacitor, resistor

As opposed to an axial lead device, those 2-contact devices with a solid, rigid wire emerging from each end of the resistor or capacitor or diode

On another note: Each colour of LED & size requires different energy. Each colour requires a certain voltage across the internal LED junction. The difference between the power source voltage & what the LED requires is absorbed by the series resistor, often referred to as the ballast resistor.

Fred, pardon my ignorance but what is a SMD

Nick.
A few more pics if they help you.
Bill

Hi Nick
Please post some pics of your running (side) light fittings so we can advise how to fit the Leds
dave976

These are some of the LEDs I bought from Temu

Agreed in all aspects of the virtues of the LED's. Cool operating, long life, and a host of available colors. The smallest "chips" can fit into tiny places and easily light up running lights, deck lights, and if run on lower voltage than what they're rated at will produce a lower brightness.

Nick
This is one of my Tug's, I used 0402 size SMD for all the lights. here is a like to a resistor calculator that I have used that worked for me.
Fred
https://www.engineersedge.com/instrumentation/series_parallel_led/series_parallel_led_calculator_12931.htm

Nick.
Some pictures at 1/72 scale.
I have more I will find later for you,busy with Grandchildren at the mo.
Bill

Take a look at Temu, they have a range of pre-wired LEDs in a range of colours and types. They are really cheap.
Some of their tools are not bad as well.

I am currently make a boat at 1:12 scale and have made my navigation lights (see photos). The red LED requires less voltage than the green, and a resistor is required to reduce the voltage so they can both operate safely on 3v. The port light has the resistor mounted in a small box immediately behind the LED.
Hope this helps 😉

Nick
This chart will help with the size of the resistor, as for the the type of lamp holder all I used was an off the shelf lamp fitting that I got from Cornwell Models, and fitted the SMD's that I posted in answer 9 into the body, don't forget you can get all sizes of prewired SMD's

Hi Nick.
I will post some pictures later for you busy at the mo👍👍

The life of the LED is not the problem, its how they are fitted to look authentic is the issue......photos would help please.

Hi Nick
LEDS are long life and as Fred says they last a long time. Certainly my experience. They are however extremely intolerant to too high a voltage and current, even for a microsecond. Once blown they are toast. That is why a series resistor is placed in line between the power supply and one of the LED leads. The How to Pages have articles describing the details. You can use electronic devices that reduce the voltage to a safe level and remove the need for the resistor. However different coloured Leds require different voltages so resistors are sometimes the best option, especially for Red and Green types.
cheers
Dave

NickD
I have LED's in one of my boat that have been in use for the last four years and still going strong, it has been said that a LED's can last up to 5,000hrs, I am now starting to replace the grain of rice with LED's and SMD's, I have just ordered some pre wired SMD's from Aliexpress, 40 (1206) SMD's for £7.69
https://www.aliexpress.com/item/1005001975757258.html?spm=a2g0o.order_list.order_list_main.5.417c18021cOWsa
Fred

It's Port and Starboard marker lights.
👍

I have bulbs a various correct colours and voltages, it's just the way they are fitted to look authentic and easily removable when LED dies for replacement. 🤔

Marker lights (housings) come in various shapes and sizes. Are you talking about those on masts or small boats, ships, etc. Are you looking for the bulbs themselves or the whole housing? Question needs to be more specific.
Lew
Florida, USA
A link for some tips:
https://evandesigns.com/pages/tips-for-using-leds

Thanks, I was going to use LED's just wondered hiw you mounted them on the sides please?🤔

Red and Green LEDs, they work on 3volts, if using higher voltage you will need resistors in the circuit to reduce the voltage 👍

I also have been using LED for my lighting needs. Readily available in red ; green and other colors. They can be turned on and run for many hours with very little battery usage.
Rick

What scale? There are fittings available in the larger scales, but I have wrapped colored LED’s with trim tape to simulate the bottom and top of a light bulb and painted the ends.