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The functions of lighting Lighting is provided in a building to fulfil three basic functions:

Describes the rapid technical development that took place in the lighting industry in the 1980s, driven by energy cost pressures. Discusses product development, office lighting problems, legislation, changing working needs, new design approaches, HF fluorescent lighting, maintenance, and energy and lighting. Concludes that both economic pressures and users′ demand for better quality lighting are dictating a more professional approach to lighting scheme design.

Interior workspace environments use exclusively artificial light, resulting in a loss of biological connection and natural light quality, as well as greater energy consumption. The purpose of the study is to identify a suitable system that can provide natural light to such interior spaces throughout the day while supplementing it with artificial light when necessary. The fundamental aim is to provide insights into the most effective solutions for energy-efficient lighting design in the UAE's environment, with the potential to lower energy consumption related to interior lighting.

The study adopted an empirical approach to gather and analyze primary data based on field measurements to understand and assess existing lighting conditions, as well as DIALux lighting simulation software to test the efficacy of the proposed HLS in terms of natural light delivery, illumination quality and energy consumption. A branch of a local bank in the United Arab Emirates, situated inside one of the shopping malls where there is no natural light penetration, has been chosen as a case study.

The findings of comparing the base case to four probable scenarios that used HLS revealed that the third scenario, which uses 100% pure sunshine and 35% artificial LED light during daylight operations and 100% LED light during night duty, is considered to be optimal in terms of illumination quality and energy efficiency.

The study demonstrated the potential of innovative lighting to improve the visual working environment in interior spaces with limited access to direct natural lighting, especially in arid regions, where sunlight is plentiful throughout the year. The study contributes new insights into the establishment of lighting-related recommendations and standards for the UAE context. This may include advice for sustainable construction practices, lighting guidelines or incentives to encourage the use of hybrid lighting technology in commercial and institutional buildings.

The responsibilities of the employer/facilities manager in today′s “commercial” world are extensive when considering the wellbeing of staff and the economic working of the office/building. One element of this tangled web is lighting. The recent publication by the Chartered Institute of Building Services Engineers (the professional body), Lighting Guide No. LG7, Office Lighting (1993), is an invaluable compendium in guiding professional “lighters” and the non‐expert in design standards. The guide is particularly useful not only in considering good practice, but also in identifying subjects where the employer is possibly vulnerable with respect to recent EEC legislation and health and safety requirements for satisfactory VDU operations working; and emergency lighting, among others. Examines the contents of LG7, highlighting areas of particular interest and likely concerns to the inquisitive facilities manager.

Night lighting reflects the prosperous development of economic and the increasingly rich and colorful cultural life. Currently, various technical standards, protocols and management specifications have been developed to build a safe, comfortable and economical lighting environment. However, prevailing evaluation systems focus on objective indexes of illumination and have ignored environmental characteristics and subjective feelings and lacked consideration of regional culture, economic benefit, management and maintenance. In this context, a lighting evaluation system combining subjective and objective is proposed for the first time in this study to explore approaches to guide the development of a healthy and comfortable urban night-time environment.

Existing research and relevant lighting standards are analyzed and an evaluation model with a logical hierarchy is constructed by combining with the evaluation theory that is set based on people and the environment. The index weights were scientifically determined on the basis of the analytic hierarchy process (AHP) and fuzzy comprehensive evaluation method. The rationality and validity of the proposed evaluation system is verified in accordance with field projects and case studies.

Taking into account traditional and cultural factors, the evaluation model established has an acceptable accuracy. Evaluation based on subjective-objective combination can provide a scientific basis for the management and optimization of night lighting.

The proposed evaluation system can serve as a guiding reference for other areas of cultural identity and esthetic perspective.

Properly planned road illumination systems are collectively a public wealth and the commissioning of such systems may require extensive planning, simulation and testing. The purpose of this simulative work is to offer a simple approach to facilitate luminance-based road lighting calculations that can be easier to comprehend and apply to practical designing problems when compared to complex multi-objective algorithms and other convoluted simulative techniques.

Road illumination systems were photometrically simulated with a created model in a validated software platform for specified system design configurations involving high-pressure sodium (HPS) and light-emitting diode (LED) luminaires. Multiple regression analyses were conducted with the simulatively obtained data set to propound a linear model of estimating average luminance, overall uniformity of luminance and energy efficiency of lighting installations, and the simulatively obtained data set was used to explore luminaire power–road surface average luminance characteristics for common geometric design configurations involving HPS and LED luminaires, and four categories of road surfaces.

The six linear equations of the propounded linear model were found to be well-fitted with their corresponding observation sets. Moreover, it was found that the luminaire power–road surface average luminance characteristics were well-fitted with linear trendlines and the increment in road surface average luminance level per watt increment of luminaire power was marginally higher for LEDs.

This neoteric approach of estimating road surface luminance parameters and energy efficiency of lighting installations, and the compendia of luminaire power–road surface average luminance characteristics offer new insights that can prove to be very useful for practical purposes.

The paper aims to establish a virtual lighting maintenance environment (VLME), and to analyze the visibility-related human factors (HFs) during maintenance operations through interactive simulations.

First, an accurate task lighting modeling method was developed, which includes lighting information modeling and illuminant parameters calibration. Then, the real-time interaction between the task lighting and three-dimensional virtual human was modeled. After that, the attenuation coefficient of visibility was determined. Also, the HFs’ analysis process in VLME was described in detail.

A case study of power supply module replacement of radar equipment was performed in VLME. The HFs’ analysis demonstrated that the task lighting significantly affects the visibility, which causes indirect impact on posture comfort and operation safety.

Through evaluating maintenance operation processing in lighting environment, engineers can better analyze and validate the maintainability design for complex equipment, and some potential ergonomics and safety issues can be found and dealt earlier.

An VLME was built for interactive “human-in-loop” maintenance operation simulation, which can support HFs’ evaluation in lighting environment accurately and effectively.

The purpose of this paper is to examine safety lighting at an existing US government facility.

Field measurements of exterior illumination were conducted at four building sites housing laboratories, offices and a cafeteria at night and the findings were compared to the industry recommendations, the Illuminating Engineering Society of North America (IES) safety lighting recommendations.

Laboratory, office and cafeteria building exteriors were classified as “high hazard” due to area wildlife, potentially dangerous equipment and chemicals, the threat of intruders, and uneven terrain. Some sites' existing light levels fell far below industry recommendations and others greatly exceeded recommendations. Most of the existing lighting was uneven, unsustainable, rendered colors poorly, produced glare and/or remained energized when no one was present.

This study is limited by the small number of sites and limited geographical area of the sites. Lighting field studies can improve user safety, save energy and reduce facilities' waste.

This study employs a relatively simple approach to examine safety lighting that facility managers could adapt for their own facilities to inform improvements.

The current lack of lighting field studies, safety lighting research and case studies regarding government facilities is addressed by contributions of this research.