This very bright unit consists of 4 LEDs connected to one input with one bridge rectifier / resistor / capacitor unit.
It is plug and play, ready for use with 7-19 volts of AC, DC or DCC power.
Each LED is on it's own fine 8" wire. The maximum distance apart you can reach these little lights is about 15-16 inches. Of course with the fine wire you can also locate them closer together, just loop or tape the extra wire out of the way.
You can get a 4 LED unit in our smaller Chip and Pico Size on this page of our website: https://www.modeltrainsoftware.com/collections/hobby-leds/products/4-smd-chip-leds-on-one-circuit
We also have 4 LED units in 3 Volts and 5-12 Volts DC on this page of our web site https://www.modeltrainsoftware.com/collections/hobby-leds/products/4-led-unit
This unit was originally suggested by our friend Stephen Priest, Master Model Railroader. He uses it for HO scale locomotive and passenger car lighting.