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

An 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 [...]

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, [...]

A system solution for the assessment of photobiological safety of lamps and lamp systems

Optical radiation, including light from artificial sources, may cause so-called photobiological hazards to the eye and skin. This is a problem widely discussed in the lighting industry, which leads to many misunderstandings and doubts. These may result, on the one hand, from the fact that the assessment of these hazards requires specialist knowledge and experience, [...]

Light for colour evaluation in printing and graphic arts industries

Visual evaluation of colours in printing and graphic arts industries is of key importance for the process of colour management and verification of print quality. In order to properly assess colour, it is necessary to ensure proper lighting conditions, as described in ISO 3664:2009 standard. Despite the fact that almost 10 years have passed since [...]

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 [...]

Using Integrating Spheres Correctly to Measure LEDs

LEDs have opened up new dimensions of design freedom, allowing architects and designers to give free rein to their creativity. Light-emitting diodes permit manifold design solutions as a light source in illumination products. However, a suitable measuring method for comparing key technical data is required in order to get the best out of the diversity [...]

Practical Guidelines for Sphere and Goniometer Measurements in View of CIE S 025/E:2015

The latest CIE S 025/ E:2015 standard provides the conditions required to perform reproducible photometric and colorimetric measurements on LED lamps, LED modules, and LED luminaires (LED devices).  The main goal here is to obtain reliable and accurate photometric data for LED devices and ensure that the data is consistent, meaning that the results are [...]

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