Testing the quality of road lighting according to the criterion of illuminance

The quality of road lighting and the way in which urban spaces and public spaces are illuminated have been widely discussed in recent years in view of the increasing use of LED lighting, which is significantly different from traditional lighting systems with discharge lamps. New technology affects the change in the construction of the luminaire, [...]

Quantity vs. quality of LED lighting. Evaluation measures with consideration of physiology of vision, efficiency, and photobiological safety.

LED technology and its application in luminaires pose a new challenge for quantitative and qualitative evaluation of lighting, taking consideration of its influence on the comfort of performing visual tasks, on photobiological effects, and on photobiological safety. The field of LED lighting is in a particular way interpenetrated by issues related to the design, construction, [...]

Road lighting quality verification using luminance distribution method.

The use of modern LED luminaires in road lighting allows for significant energy savings and can be an opportunity to improve lighting conditions on illuminated road sections. Therefore, cities, municipalities and road managers decide to invest in modern lighting solutions. Optimal use of the advantages of the new LED technology and ensuring proper quality of [...]

Verifying indoor LED lighting for classrooms. Standard requirements, available instruments and new quality considerations

By Mikołaj Przybyła IES Member CIE Member| GL Optic  Proper lighting plays a key role in creating the right lighting conditions for learning and working in schools and other educational institutions, providing visual comfort, safety and energy efficiency. However, it is not enough to replace old luminaires with modern ones. What should be done to [...]

New Ecodesign Regulation on flicker and stroboscopic effect in LED lighting.

Flicker and Stroboscopic Visibility Measure (SVM) to be introduced by the revised Ecodesign Regulation for light sources by the end of 2019. Evaluation and measurements of optical flicker is a new task for electronic developers who provide solutions for LED lighting applications. When new drivers, power supplies or dimming electronics is purchased or designed, engineers [...]

How to organize a modern photometric laboratory Part 3 – introduction to luminance measuring devices

Luminance is the most important quantity in lighting design and the most important measure in road lighting and architectural illumination. It is also the measure that is probably the easiest to understand and notice by the user, because it determines the “brightness” of the observed objects and surfaces. The 21st century, revolutionized by the widely [...]

How to organize a modern photometric laboratory Part 2 – selection of an integrating sphere system

Integrating spheres are one of the basic instruments for measuring light sources, lamps and luminaires. Traditionally, an integrating sphere is also called an Ulbricht sphere, and its name comes from the name of German engineer Richard Ulbricht, who during the preparation of electrification and lighting of a railway station dealt with photometric measurements in order [...]

How to organize a modern photometric laboratory Part 1 – selecting a goniometer system

Many manufacturers of lighting products use external measurement laboratories to verify compliance with standards and assess performance. Some manufacturers or importers rely solely on their suppliers' datasheets and try to avoid having to carry out measurements on their own. This situation is quite common not only among small start-ups but also larger lighting companies in [...]

Modern Lighting Audits. Technology supporting designers and contractors to verify lighting conditions

Available lighting design software tools support architects, engineers, and designers with the calculation and simulation of luminance levels and even correlated color temperature (CCT), but little is available for on-site verification tools. Nevertheless, verification can insure conformance for specific application requirements such as detailed task-work, food inspection, color critical viewing, warehouse isles, safety exit signs, [...]

Understand the causes, consequences, and measurement of light flicker

As modern energy-efficient lighting technologies, including LED-based solid-state lighting (SSL), proliferate in our environment, awareness of their impact on biology and even technology evolves as well. LED lighting’s rapid development and assimilation, often without clear standards, may result in lighting flicker with adverse effects. Many organizations, including international standards bodies and regulatory agencies, and industry [...]

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