LED lighting is a fast-developing technology with many advantages over filament and gas discharge lighting systems. However, inappropriate design, application and poor-quality installation of LED lighting systems could negate these advantages and result in inadequate lighting, failure to meet lifetime performance expectations, potential public health and safety issues or even interference with other technology due to poor systems integration.This 2nd edition has been updated to reflect new standards and guidance including: asset management, application and testing, performance, power management, dimming and flicker, communication protocols (DALI2) and wireless networking and controls, with additional considerations including health and biologically effective lighting. The Code is necessary for all those responsible for design, installation, integration and management of lighting systems.