A course for graduate electrical, photovoltaic, mechanical and civil engineers covering the areas of energy efficiency in electrical lighting and electrical equipment. In the lighting area the course provides the basics of design for optimum illuminance for different lighting applications and techniques for improved energy efficiency, including choice of light sources, lighting control systems and luminaire design. The area of energy efficiency of equipment will cover both electrical supply and industrial and commercial utilization applications. It will include an outline of the intrinsic energy loss mechanisms that occur in electrical equipment and in power supply systems, including power supply components such as transformers, cables and generators, and utilization equipment such as motor drives, electroheat systems and general appliances. Measurement of losses and on-line energy use monitoring methods will be covered and the methods available for reducing equipment losses through optimal selection of materials, design configuration such as power factor correction, voltage control and load management will be considered. The impact of power quality on losses will also be reviewed, particularly harmonic generation by non-linear power electronic loads. The design of power supply for data centres, with their particular power quality problems will also be considered.