This publication provides introductory technical guidance for electrical engineers and other professional engineers, construction managers and building managers interested in lighting upgrades for buildings to improve energy efficiency and lighting quality. Here is what is discussed: 1. INTRODUCTION, 2. THE IMPORTANCE OF LIGHT, 3. A WHOLE-SYSTEM APPROACH, 4. LIGHTING DESIGN, 5. USE EFFICIENT LIGHT SOURCES, 6. USE EFFICIENT LUMINAIRES, 7. AUTOMATICALLY CONTROL LIGHTING, 8. DIMMING CONTROLS, 9. COMMISSIONING ENSURES THE BENEFITS OF LIGHTING CONTROLS, 10. BUILD IN AN OPERATIONS AND MAINTENANCE PLAN, 11. SUMMARY, 12. BIBLIOGRAPHY.