These 4 warm white LEDs are connected to one input and one bridge rectifier / resistor / capacitor unit. Each LED is on it's own 5" wire. So the maximum distance apart you can reach these little lights is about 9 1/2 or 10 inches.
This unit is a concept of Stephen Priest, Master Model Railroader and Senior Editor of Scale Rails, the National Model Railroad Association's official Magazine for Model Train Enthusiasts of all Scales. Stephen had Evan Designs construct this unit for his HO scale locomotive and also his passenger car lighting.
A great way to add nice warm white light to a train, passenger station, building, and more!