This kit will build a single Searchlight Signal in several different configurations.--- Parts are included to make a Single, Double or Short Dwarf signal with an open or closed cabinet.--- See prototype here: https://www.flickr.com/photos/mark_vogel/6844881659/ ----- Without compromising scale, we have re-designed our signals now to hold our specially designed, micro tri-color LED right in the signal head which will eliminate fiber optics. These new LEDs have been developed in partnership with Richmond Controls. We are happy with the results, as these signals emit a strong light. One LED light is required for each signal head, and yes, the wiring does fit inside the pole. The new Micro LEDs need to be purchased separately. If you purchased our fiber optic method and need parts or assistance for them please contact us and we will be glad to help you.