With the increasing complexity of technical equipment, modules and individual components, reliability, lifetime and the cost of exchanging and revision become increasingly important for the customer. The single requirement that devices should not fail is no longer sufficient for modern, powerful components or devices. More often, it is an additional requirement that they should […]
Apart from damaging solar photovoltaic (PV) modules, inverters and monitoring elecronics, lightning strikes also lead to field-based and conducted electrical interference. According to the South African Photovoltaic Industry Association (SAPVIA), photovoltaic (PV) is the fastest growing power generation technology in the world. More than 35 GW of PV is installed and operating worldwide, producing […]
Most LED manufacturers use units of luminous intensity (cd) for the measurement and classification of LED brightness. This procedure is reliable and reproducible for numerous LED types, but is insufficient for LEDs with narrow emission angle characteristics. This article describes the procedures for measuring luminous intensity, partial flux and luminous flux, along with the […]
LED retrofit lamps meant to replace existing, traditional lamps directly, constitute an important part of the LED lighting market. These lamps differ fundamentally from traditional lamps which are replaced frequently; this is not the case for LED lamps because of their long lifetimes. Once a traditional lamp is replaced by an LED lamp (i.e. […]
It is expected that LED lighting will account for more than half the global lighting market by 2017, making it essential for the end-user to better understand this technology. Although the cost of LED products is currently higher than regular lighting systems, the demand for LED technology is growing exponentially, which will inevitably result […]
The Urbanscreen artist group from Bremen have plunged the Gasometer in Oberhausen into a perfect light illusion as part of the giant multimedia installation, 320° Licht. The precise measurement of space is the basis for this digital art. Leica Geosystems has been providing Urbanscreen with the most up-to-date scanners since 2012 and products like […]
Major Tech has extended its LED lighting product offering to include a new range of LED ceiling and downlights. The standard Major Tech formula of offering a high-quality range of lighting products at a reasonable price has been achieved once again. The range is supplied as an integrated system whereby the LEDs and housings […]
Power surges in LED mast lighting has led to higher dielectric strength and impulse current withstand for LED drivers, but surges in the mains can exceed these values many times over. LED mast lights for street, walkway and open space lighting are mounted at light point heights of several metres to ensure a large […]
by Dr. Mark Rea, Aaron Smith, Andrew Bierman, Dr. Mariana Figueiro, Lighting Research Center, Rensselaer Polytechnic Institute, New York A quantitative analysis of the impact of light, particularly from streetlights of different spectral power distributions on the human circadian system. The International Dark Sky Association (IDA) has drawn attention to the relative spectral composition […]
The commonsense science of daylight harvesting uses sunlight to create spaces which are comfortable, energy-efficient, sustainable and code compliant. Daylighting is a relatively new term for an ancient practice. In the millennia before the introduction of electricity, buildings had to rely on available daylight to illuminate interior spaces. More recently, daylight harvesting became almost […]
