This book describes the concepts behind lighting model railroad buildings, cars, towers, bridges and other scenes on a model railroad or diorama using LEDs. In the contents are practical examples for using LEDs. It describes a simple approach to achieving a high density, low cost method for lighting your model railroad using a dimming controller.. The text addresses the use of both custom LEDs and commercially available pre-lit buildings. The text includes actual test data taken by the author to prove the concept is safe and reliable. Note: to construct some of the projects in the book you should be familar with simple wiring diagrams, schematics, soldering and/or breadboards.. Chapter 1 – The Basics Chapter 2 – Recommended LEDs Chapter 3 – Dimming Control Chapter 4 – Test Results Chapter 5 – Dimming Circuit Sources Chapter 6 – Dimming Circuit Conclusions Chapter 7 - Installation of LEDS. Chapter 8 - Additional Lighting Topics Chapter 9 - Advanced Lighting Control Chapter 10 - Lighting Strategies Appendix