Abstract
This paper presents the results of a multi-disciplinary effort to clarify the state of the art and the state of practice, and necessary future research for creating the seamless integration and application of light in buildings, regardless of source, which is purposely modulated to illuminate surfaces and designed in a way that is comfortable, healthy, pleasing, cost-effective, and energy efficient. The authors unwrap the research, tools, and technical gaps preventing the full integration of electric lighting and daylighting with advanced façades through the coordination of lighting and windows research activities. The study and a stakeholder workshop captured current technology readiness levels (TRL), as well as research thrusts and implementation guidelines, and identified research priorities, presenting an analysis of the current landscape of lighting metrics—and which metrics are in the critical path for developing integrated daylighting and electric lighting systems, and their design, installation, and technology guidelines. In addition, the study defined stakeholder coordination, pathways to interoperable technology, and the value of viewing the work of the individual research areas holistically rather than in isolation.
Highlights
IntroductionToday’s typical buildings have lighting systems that are often disconnected from the other building systems (e.g., energy management systems, other mechanical, electrical, plumbing, demand responses) and their control instruments
Today’s typical buildings have lighting systems that are often disconnected from the other building systems and their control instruments
Daylighting systems are separated from electric lighting systems, and both are characteristically detached from other systems such as safety, security, communications, and information systems
Summary
Today’s typical buildings have lighting systems that are often disconnected from the other building systems (e.g., energy management systems, other mechanical, electrical, plumbing, demand responses) and their control instruments. Recent convergences of scientific and technical trends have increased the potential of the value proposition (and the chances of success), for realizing the design and implementation of fully integrated lighting systems Those trends include significantly upgraded capabilities for modeling the behavior of light in spaces; the availability of spectrally tunable solid-state lighting (SSL); the maturing of internet-of-things connectivity (making real-time data exchange between building systems feasible); and sensors and controls technologies having markedly enhanced performance (at smaller sizes and lower costs). This technical progress should be viewed as supporting the design and delivery of the suitable type, quantity, and quality of light to building occupants, because there is growing scientific evidence of the importance of light on human health and well-being. The second (Sections 3.2–3.5 and 4.2, Sections 4.3–4.5) describes the state of research for both daylight and electric lighting systems as well as future research needs
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