Aiming to achieve net zero energy lighting in buildings.

Energy consumption for interior lighting is rapidly increasing and takes up 17.5% of the total global electricity consumption on average. With European office buildings using 50% of their total electricity consumption for lighting alone, and other shares of electricity of 20-30% in hospitals, 15% in factories, 10-15% in schools and 10% in residential buildings, there is significant potential to reduce energy consumption for lighting. By implementing a combination of key measures, such as minimisation of lighting power density; use of highly-efficient lighting technologies based on renewable energy sources; use of appropriate lighting control systems; and maximisation of daylight use, energy saving targets can be pushed forward to aim at achieving net zero energy lighting in buildings. This paper presents findings from Building Research Establishment projects for public and private buildings to reduce lighting energy consumption whilst improving the quality of the internal luminous environment. [ABSTRACT FROM AUTHOR]