Energy-Efficient Lighting



The quantity and of light around us determine how well we see, work, and play. Light affects our health, safety, morale, comfort, and productivity.

also directly affects our economy. As a nation, we spend about one-quarter of our on lighting, or more than $37 billion annually. Yet much of this expense is unnecessary. Technologies developed during the past 10 years can help us cut lighting costs 30% to 60% while enhancing lighting quality and reducing environmental impacts.

This is an introduction to lighting technology and discusses how you can save energy while maintaining good and quantity. Specifically, you will learn about:

  • Lighting principles and definitions
  • Types of lighting and how each works
  • Energy-efficient lighting options, including daylighting, for new or
    retrofit applications.