ABSTRACT
The initial concept of light-emitting diode (LED) lighting was developed for electronic devices, signal lighting, and decorative external lighting. In continued development, high output 'white' LED have been designed and engineered to replace traditional lighting equipment for more energy efficient systems. Current market LEDs are available with lumen efficacy up to 120 lumens, and provide high lumen maintenance, long life, and instant dimmable light. LEDs are also noted for their benefits of no infrared and ultraviolet radiation, no mercury content, and a high degree of recyclable content for a sustainable lighting solution. Recent LED installations have included office environments, restaurants, hotels, roadways and car parks, and feature lighting. With improvements in high colour rendering white LEDs, street lighting installations have the side benefit of dramatically improving the resolution of CCTV coverage to areas such as car parks and building elevations. Manufacturers and suppliers make great hay regarding the energy savings that can be made against more traditional light sources.
