Digital LED lighting systems provide new and practical solutions that can double the energy saved at marginal increase to upfront cost. The rise in popularity of solid-state LED lighting has led to a demand for more intelligent controllers and drivers for this technology. These will ensure more effective LED lighting solutions which, in return, […]
How the lighting engineer or designer can determine and apply the correct maintenance factor for LED lighting solutions to help prevent over-lighting. In conventional technology (luminaires and lamps), the lamp manufacturer is responsible for the lamp lumen depreciation (LLD) and the lamp survival factor (LSF) whereas the manufacturer of the luminaire is responsible for the […]
A well-conceived surge protection concept for LED lights should be incorporated at the design stage to ensure longevity and availability, and to avoid unnecessary maintenance. Street lights are currently being retrofitted in German communities and municipal utilities, often with LEDs. The reasons for this include, for example, energy efficiency, subsidy programmes, removal of certain lamp […]
The upfront investment in LED technology is high but how do you know if the LEDs you are buying are of good quality or suitable for your installation? LED lighting offers many advantages such as energy efficiency, low maintenance, long life and ease of installation, to name a few. All LED lighting, however, is […]
This article outlines the opportunities offered by advances in LED technology in alleviating the current power supply problems facing South Africa. A major challenge facing South Africa at present is a renewed electricity shortage and the devastating impact this has on the economy. This issue is much-discussed with the focus firmly on Eskom’s financial […]
The application of specifically designed and formulated chemical products for thermal management applications, particularly within the rapidly-expanding LED industry. Specifically designed and formulated chemical products are widely used in the electronics industry for a vast array of applications. Whether it is during PCB manufacture or for the protection of components or complete devices, these products […]
Calibration procedures and operating guidelines for integrating spheres measuring the optical performance of LED and SSL products. Reliable measurement standards are needed to make a fair comparison between SSL and LED products from different vendors. The International Commission on Illumination’s report CIE 127:2007 covers guidelines on how photometric, radiometric and colorimetric quantities for individual […]
Different lux meters can provide different readings for the same LED. London Underground must provide safe levels of light for customers and staff, but this could be difficult without reliable lux measurements. London Underground, like much of the UK, is embracing LED lighting. Its low energy consumption and, more significantly, reduced maintenance, mean that there […]
The lighting in the majority of South African offices is neither particularly innovative nor especially energy efficient. All too often, the only lighting designed for our offices is either fluorescent of one type or another with the entire office area lit to a single light level. The UK Business Council for Offices guide was published […]
A comparison between incandescent bulbs and LEDs to highlight the difference between current and voltage-driven devices with a view to designing and using driver electronics. To understand the difference between incandescent bulbs and semiconductors such as LEDs, let us consider voltage driven devices. The filament of an incandescent bulb is simply a resistor. When electrically […]
