| Records |
| Author |
Żagan, W.; Skarżyński, K. |
| Title |
The “layered method” – A third method of floodlighting |
Type |
Journal Article |
Year  |
2019 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
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Issue |
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Pages |
in press |
| Keywords |
Lighting |
| Abstract |
The main aim of this work is to present a new method of floodlighting – the ‘Layered Method’. It has been possible to create this method due to the rapid development of linear luminaires with LEDs. When luminaires are located a very short distance from an illuminated wall and are directed at a low angle, the layered floodlighting method gives an unusual and interesting visual effect. In this situation, the length of light distribution on the illuminated wall is the same as the length of the light line and is rather short in width. This gives the opportunity of creating the effect of a layer of light, which can be used, for example, to illuminate Renaissance tenement houses and all types of longitudinal architectural details, such as tympanums or balusters. This paper presents the state-of-the-art use of the layered method of floodlighting. All advantages and disadvantages, in terms of lighting technology and architecture, are carefully described. The ideas contained in this paper could be useful for those who are interested in making architectural objects more beautiful by means of illumination at night-time. |
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1477-1535 |
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GFZ @ kyba @ |
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2807 |
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| Author |
Schulte-Römer, N.; Meier, J.; Söding, M.; Dannemann, E. |
| Title |
The LED Paradox: How Light Pollution Challenges Experts to Reconsider Sustainable Lighting |
Type |
Journal Article |
| Year |
2019 |
Publication |
Sustainability |
Abbreviated Journal |
Sustainability |
| Volume |
11 |
Issue |
21 |
Pages |
6160 |
| Keywords |
Energy; Lighting; Society |
| Abstract |
In the 21st century, the notion of “sustainable lighting” is closely associated with LED technology. In the past ten years, municipalities and private light users worldwide have installed light-emitting diodes in urban spaces and public streets to save energy. Yet an increasing body of interdisciplinary research suggests that supposedly sustainable LED installations are in fact unsustainable, because they increase light pollution. Paradoxically, blue-rich cool-white LED lighting, which is the most energy-efficient, also appears to be the most ecologically unfriendly. Biologists, physicians and ecologists warn that blue-rich LED light disturbs the circadian day-and-night rhythm of living organisms, including humans, with potential negative health effects on individual species and whole ecosystems. Can the paradox be solved? This paper explores this question based on our transdisciplinary research project Light Pollution—A Global Discussion. It reveals how light pollution experts and lighting professionals see the challenges and potential of LED lighting from their different viewpoints. This expert feedback shows that “sustainable LED lighting” goes far beyond energy efficiency as it raises complex design issues that imply stakeholder negotiation. It also suggests that the LED paradox may be solved in context, but hardly in principle. |
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2071-1050 |
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GFZ @ kyba @ |
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2824 |
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Owen, S.; Noy, I.; Paz, J.P.; Fleming, D. |
| Title |
EQC and extreme weather events (part 2): Measuring the impact of insurance on New Zealand landslip, storm and flood recovery using nightlights |
Type |
Journal Article |
| Year |
2019 |
Publication |
Motu Economic and Public Policy Research |
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Motu Working Paper19-19 |
Issue |
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Pages |
1-23 |
| Keywords |
Lighting |
| Abstract |
Climate change is predicted to make extreme weather events worse and more frequent in many places around the world. In New Zealand, the Earthquake Commission (EQC) was created to provide insurance for earthquakes. In some circumstances, however, homeowners affected by extreme weather events can also make claims to the EQC –for landslip, storm or flood events. In this paper,we explore theimpact of this public natural hazard insurance on community recovery from weather-related events. We do this by using a proxy for short-term economic recovery: satellite imagery of average monthly night-time radiance. Linking these night-time light data to precipitationdatarecords, we compare houses which experienced damage from extreme rainfall episodes to those that suffered no damage even though they experienced extreme rainfall. Using data from three recent intense storms, we find that households which experienced damage, and were paid in a timely manner by EQC, did not fare any worse than households that suffered no damage from these extreme events. This finding suggests that EQC insurance is serving its stated purpose by protecting households from the adverse impact of extreme weather events. |
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GFZ @ kyba @ |
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2901 |
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| Author |
Gălăţanu, C. D., Ashraf, M., Lucache, D. D., Beu, D., & Ciugudeanu, C. |
| Title |
OPTICAL UTILIZATION FACTOR FOR ARCHITECTURAL LIGHTING. |
Type |
Journal Article |
| Year |
2019 |
Publication |
Light & Engineering |
Abbreviated Journal |
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| Volume |
27 |
Issue |
6 |
Pages |
49-57 |
| Keywords |
Lighting |
| Abstract |
Optical utilization factor (OUF) is applied to architectural lighting, searching to obtain low light pollution. It is demonstrated that OUF could not be used for the assessment of light pollution, because the inter-reflections could not be neglected. DIALUX simulations and MATLAB original functions are used. Onsite measurements for illuminance and luminance are performed. It is demonstrated that OUF could be greater than one for the facade. For the small scale inter-reflections, a luminance gain is demonstrated. Due to this, the floodlighting could be reduced. The understanding about the light pollution assessment is changed, which is a major achievement. It means that a greater OUF don't represent a lower light pollution, and also a facade could be more “visible” on lower level of floodlighting. |
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IDA @ intern @ |
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2964 |
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| Author |
Kowalska, J. |
| Title |
Coloured light pollution in the urban environment |
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Journal Article |
| Year |
2019 |
Publication |
Photonics Letters of Poland |
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11 |
Issue |
4 |
Pages |
93-95 |
| Keywords |
Lighting |
| Abstract |
The article deals with issues related to colored lighting occurring in urban space. On the example of the Colosseum Amphitheatre 3D model, applications of colorful illumination were shown and the rationale for using color in individual cases was discussed. The aim of the article is to draw attention to proper planning and modernization of lighting to limit the negative interference of light in the ecosystem. |
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IDA @ intern @ |
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2969 |
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