The costs for lighting energy consumption can be the single largest part of the annual energy bill building, particularly for commercial buildings. There is an opportunity during refurbishment or initial construction to ensure that the lighting installation achieves the best possible lighting energy efficiency and quality of light. This minimises annual lighting energy cost for the client, significantly improves whole life performance, and simultaneously enhances the working environment so encouragingmaximum productivity. Often, electrical contractors are asked to provide their clients with advice and guidance on the best type of lighting equipment to achieve highest energy efficiency for a lighting installation. This may be difficult if lighting is not part of the contractor’s main technical expertise. Installers’ Lighting Guide 007 guide provides practical assistance to electrical contractors in understanding and estimating the energy efficiency of lighting installations so allowing contractors to give better informed guidance to their clients.