詳細

We often do not fully understand what lighting can do for us. We know that we need lighting, but often that is as far as the thinking goes. We do a really good job, however, of conceptualizing the costs of those lighting systems because we can readily measure those costs. Reducing costs will certainly increase the value ratio for lighting if the benefits of the lighting system are held constant. Without a clear purpose for the lighting system, and no clear idea of benefits, there is little else that can be used in the value engineering process.

This book is dedicated to the notion that our society undervalues light because we do not properly measure the benefits of light, in terms of both the lighting system and how it is applied. Consequently, we unnecessarily waste our natural and capital resources. The problems associated with inadequate light-measurement systems are not hard to grasp or even to fix, and are the subject of Value Metrics for Better Lighting. This book was written as a starting point for thoughtful consideration, discussion, and action by those vested in better and more-sustainable lighting, including manufacturers, practitioners, regulators, advocates, educators, and, of course, users.

“It is a well-written review of the Lighting Research Center’s valuable contributions to the field of illumination engineering and architectural lighting design. Specifically, the overall organization, scope and argumentation of the manuscript are exemplary. It takes a premise ? '… we often do not fully understand what lighting can do for us' ? and presents a cohesive and detailed overview of the institution’s contributions to the field.” --Ian Ashdown, byHeart Consultants Limited

“In my opinion, the topic is extremely exciting and the book might have a big impact on the lighting industry. I very much enjoyed reading it. I do not know of anybody else in this field who would be more qualified than Prof. Rea to write this book.” --Dr. Klaus Streubel, OSRAM AG

Sample Pages (PDF)

Acknowledgments
Chapter 1. Introduction
Chapter 2. Measurement
　2.1 What is Light?
　　2.1.1 The photopic luminous efficiency function
　　2.1.2 Where does V(λ) apply and where doesn't it?
　2.2 What Is Color?
　　2.2.1 Color appearance
　　2.2.2 Color matching
　　2.2.3 Colorimetry
　　2.2.4 Color rendering and tint of illumination
　2.3 Color Rendering Index
　2.4 Correlated Color Temperature
Chapter 3. Value Added from New Metrics
　3.1 Beyond lm/W and lm/m2
　　3.1.1 Mesopic vision
　　3.1.2 Apparent brightness
　3.2 Beyond "Light"
　　3.2.1 Circadian light
　3.3 Beyond CRI and CCT
　　3.3.1 Color rendering
　　3.3.2 Tint of illumination
　3.4 Lighting Energy Efficiency
　　3.4.1 Application efficacy in the temporal domain
　　3.4.2 Application efficacy in the spatial domain
　　3.4.3 Calculating lighting energy efficiency
Chapter 4. An Invitation
　4.1 Unified Illuminance
　4.2 Bright Illuminance
　4.3 Circadian Illuminance
　4.4 "Class A" Color
　4.5 Lighting Energy Efficiency
　4.6 What's Next?
Chapter 5. Conclusion
　5.1 We Believe What We Hear
　5.2 What to Talk About
Appendix 1 Acronyms, Abbreviations, and Notation
Appendix 2 Determinations of Chromaticity
Appendix 3 Color Rendering Metric Calculations
Appendix 4 How to Optimize Illumination on a Residential Wall Display
Appendix 5 Relative SPDs of the Light Sources in Table 4.1
Appendix 6 Luminous Efficiency Functions for Different Benefit Metrics
Appendix 7 Resources for Maximizing the Value of Daylight Controls
References
Index