20pcs Pre Wired 5mm Warm White Led Lamp Light Set 12V ~ 18V for Train Layout

I made street lights for my hobby the lights you can use them for a multitude of things they work good and they can take it

A Great product.

Great for headlights on 1/43 diecast cars

These are nice but too bright for model train use. Should have ordered regular bulbs. Also, the wires need more length for most everything. Just be aware.

These were perfect for my model train layout! The lights are brighter than expected.

Excellent lights worked as promised on my train layout. Easy to install and well priced and packaged

nice looking ditch lights

I have hooked these up to the DC power supply for the track. Thus, when the voltage is turned on to move the train forward, they light. As LEDs only light when the polarity is from the anode (red+) to the cathode (negative-) they won't light when the power direction is reversed. This isn't an issue for AC power, but to indicate direction for a DC train it is. While with resistors you can adapt one LED to light no matter the direction, I use a different approach as they can be as small as 3mm. I simply put two together in my track light channel and wire one to the other backwards. Thus the red from one is soldered to the black on the other and together they are wired to the DC track power. You will get a light no matter the track direction (polarity). Choosing to use different color LEDs, one color can indicate forward and one color reverse :) This is a simple effective cheap and easy way to show power and direction on a control board using single LEDs.