LED lighting increases the ecological impact of light pollution irrespective of color temperature

2014 ◽  
Vol 24 (7) ◽  
pp. 1561-1568 ◽  
Author(s):  
S. M. Pawson ◽  
M. K.-F. Bader
Keyword(s):  
Ecological Impact ◽  
Color Temperature ◽  
Light Pollution ◽  
Led Lighting

scholarly journals A Systematic Review of Research Investigating the Combined Ecological Impact of Anthropogenic Noise and Artificial Light at Night

2021 ◽  
Vol 9 ◽  
Author(s):  
Wouter Halfwerk ◽  
Paul Jerem
Keyword(s):  
Systematic Review ◽  
Observational Studies ◽  
Ecological Impact ◽  
Experimental Studies ◽  
Ecological Impacts ◽  
Anthropogenic Noise ◽  
Light Pollution ◽  
Artificial Light ◽  
Light At Night ◽  
The Impact

Levels of anthropogenic noise and artificial light at night (ALAN) are rapidly rising on a global scale. Both sensory pollutants are well known to affect animal behavior and physiology, which can lead to substantial ecological impacts. Most studies on noise or light pollution to date have focused on single stressor impacts, studying both pollutants in isolation despite their high spatial and temporal co-occurrence. However, few studies have addressed their combined impact, known as multisensory pollution, with the specific aim to assess whether the interaction between noise and light pollution leads to predictable, additive effects, or less predictable, synergistic or antagonistic effects. We carried out a systematic review of research investigating multisensory pollution and found 28 studies that simultaneously assessed the impact of anthropogenic noise and ALAN on animal function (e.g., behavior, morphology or life-history), physiology (e.g., stress, oxidative, or immune status), or population demography (e.g., abundance or species richness). Only fifteen of these studies specifically tested for possible interactive effects when both sensory pollutants were combined. Four out of eight experimental studies revealed a significant interaction effect, in contrast to only three out seven observational studies. We discuss the benefits and limitations of experimental vs. observational studies addressing multisensory pollution and call for more specific testing of the diverse ways in which noise and light pollution can interact to affect wildlife.

scholarly journals Coloured light pollution in the urban environment

2019 ◽  
Vol 11 (4) ◽  
pp. 93
Author(s):  
Justyna Kowalska
Keyword(s):  
Urban Space ◽  
Marine Biology ◽  
High Efficiency ◽  
Organic Light Emitting Diodes ◽  
Color Temperature ◽  
Light Pollution ◽  
Light At Night ◽  
Light Emitting ◽  
Engineering Society ◽  
Night Illumination

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. Full Text: PDF ReferencesP. R. Boyce, "The benefits of light at night", Building and Environment, 151, 356-367 (2019) CrossRef Y. Hu,T. Zhang ,J. Chen, D. Ma ,C. Cheng, " Hybrid Organic Light-Emitting Diodes with Low Color-Temperature and High Efficiency for Physiologically- Friendly Night Illumination", Israel Journal of Chemistry, 54, 979-985 (2014) CrossRef W. Jernarczyk, "Dwa oblicza światła", Kosmos, 64, 625-632 (2015) DirectLink J.D.Bullough, M.S Mies, "The blue-light hazard:A review", Journal of the Illuminating Engineering Society,29, 6-14 (2013) CrossRef M. Rivas., P.T. Santidrian, J. U. Dieguez, A. Marco, " Leatherback hatchling sea-finding in response to artificial lighting:Interaction between wavelenght and moonlight", Journal of Experimental Marine Biology and Ecology, 463, 143-149 (2015) CrossRef S. Marcinkowska, E. Tęgowska, "Oddziaływanie światła o różnym spectrum na bezkręgowce zmierzchu I pełnego dnia", Kosmos, 64, 589-597 (2015) DirectLink P. Jakubowski, "Wpływ rozkładu widmowego mocy promienistej ulicznych opraw oświetleniowych typu LED na zanieczyszczenie światłem otoczenia", Kosmos, 64, 643-653 (2015) DirectLink K. Skarżyński, "Iluminacja obiektów architektonicznych a zanieczyszczenie środowiska światłem", Kosmos, 64, 553-562 (2015) DirectLink P. Tabaka, I. Fryc, "Zależność poziomu zanieczyszczenia otoczenia światłem od kształtu krzywej użytkowanej oprawy oświetleniowej", Kosmos, 64, 669-677 (2015) DirectLink W.Żagan, K.Skarżyński, "Analysis of light pollution from floodlighting: Is there a different approach to floodlighting?", Light and Engineering, 25, 75-82 (2017) DirectLink J.Kowalska, "Zanieczyszczenie światłem barwnym obrazu miast", Polish Journal for Sustainable Development, 21, 69-76 (2017) CrossRef C.Gardner, "The use and misuse of coloured lighting in the urban enviroment", Optics&Laser Technology, 38, 366-376 (2006) CrossRef

scholarly journals Effect of LED Lighting Illuminance and Correlated Color Temperature on Working Memory

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Chung Won Lee ◽  
Jin Ho Kim
Keyword(s):  
Working Memory ◽  
Standard Deviation ◽  
Repeated Measures ◽  
Memory Performance ◽  
Light Condition ◽  
Bright Light ◽  
Color Temperature ◽  
Led Lighting ◽  
Temperature Conditions ◽  
Lighting Conditions

This study was conducted to verify how the illuminance and correlated color temperature of LED lighting affect working memory. For this study, an automatic LED lighting device based on a light sensor was developed and used, and the lighting conditions were treated with a total of six conditions (2 × 3): two illuminance conditions (dim: 400 lx, bright: 1,000 lx) and three correlated color temperature conditions (3,000 K, 5,000 K, and 7,000 K). There were 30 participants in the study, and the average age was 21.6 years (Standard deviation = 1.92). Participants were assigned to all six lighting conditions, and the placement order was randomized. For the measurement of working memory, 3-back task was used and the correct responses for 5 minutes were used as a dependent variable. As a result of repeated measures analysis of variance (ANOVA), both illuminance and correlated color temperature were found to be significant variables affecting working memory, and no interaction effect between illuminance and correlated color temperature was found. As a result of the post hoc verification conducted thereafter, the working memory performance in the bright light condition (1,000 lx) was 48.32 (Standard deviation = 15.63) on average, compared to 44.80 (Standard deviation = 15.29) in the relatively dim condition (400 lx). It was found that the condition of bright light was superior in performing working memory compared to relatively dim condition. The working memory performance in the correlated color temperature condition (5,000 K) was 48.32 (Standard deviation = 16.41) on average and higher than that of other color temperature conditions. As a result, working memory performance was the best in 1,000 lx, 5,000 K condition Mean = 53.43 (Standard deviation = 18.38), and 400 lx, 7,000 K condition Mean = 42.73 (Standard deviation = 17.68) showed the worst performance of working memory.

scholarly journals Evidence That Reduced Air and Road Traffic Decreased Artificial Night-Time Skyglow during COVID-19 Lockdown in Berlin, Germany

2020 ◽  
Vol 12 (20) ◽  
pp. 3412
Author(s):  
Andreas Jechow ◽  
Franz Hölker
Keyword(s):  
Road Traffic ◽  
Satellite Image ◽  
Color Temperature ◽  
Light Pollution ◽  
Artificial Light ◽  
Night Time ◽  
Sky Brightness ◽  
Night Sky ◽  
The Impact ◽  
Night Sky Brightness

Artificial skyglow, the brightening of the night sky by artificial light at night that is scattered back to Earth within the atmosphere, is detrimental to astronomical observations and has an impact on ecosystems as a form of light pollution. In this work, we investigated the impact of the lockdown caused by the COVID-19 pandemic on the urban skyglow of Berlin, Germany. We compared night sky brightness and correlated color temperature (CCT) measurements obtained with all-sky cameras during the COVID-19 lockdown in March 2020 with data from March 2017. Under normal conditions, we expected an increase in night sky brightness (or skyglow, respectively) and CCT because of the transition to LED. This is supported by a measured CCT shift to slightly higher values and a time series analysis of night-time light satellite data showing an increase in artificial light emission in Berlin. However, contrary to this observation, we measured a decrease in artificial skyglow at zenith by 20% at the city center and by more than 50% at 58 km distance from the center during the lockdown. We assume that the main cause for the reduction of artificial skyglow originates from improved air quality due to less air and road traffic, which is supported by statistical data and satellite image analysis. To our knowledge, this is the first reported impact of COVID-19 on artificial skyglow and we conclude that air pollution should shift more into the focus of light pollution research.

scholarly journals The Influence of LED Lighting in School Recreation Areas on Visual Acuity and Psycho-Emotional State of First Graders in the Dynamics of a Schoolyear

2019 ◽  
pp. 25-30
Author(s):  
NA Skoblina ◽  
OYu Milushkina ◽  
AM Kurgansky ◽  
SV Markelova ◽  
AP Tsameryan ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Emotional State ◽  
First Graders ◽  
Color Temperature ◽  
Light Sources ◽  
Color Test ◽  
Led Lighting ◽  
Light Load ◽  
Recreation Areas ◽  
The Impact

Object: The wide spread of gadgets among modern schoolchildren and their intensive use during breaks in school corridors and recreation areas indicates the necessity of improving illumination in school recreation areas to secure conditions suitable for intensive visual work. Thanks to their technical characteristics, durability and affordable price, LED light sources can ensure the implementation of this task. The objective of the study was to assess the impact of LED lighting of school corridors, halls and recreational facilities on visual acuity and psycho-emotional state of first graders in the course of a schoolyear. Materials and methods: In the corridors and recreation areas of the Dolgoprudninskaya Gymnasium (Moscow Region), fluorescent lamps were replaced by PrLUX-AU-36 LED lamps with Epistar LEDs, opal diffuser, 3600Lm luminous flux, and the color temperature of 4000K. Measurements of artificial lighting were taken before and after installing LED lamps using a TKA PKM 43 light meter. We conducted a study of visual acuity among 67 first graders (aged 7-8) in the annual dynamics from September to May using the Sivtsev-Golovin table placed in the Rota apparatus. Testing was conducted by a highly qualified ophthalmologist. The psycho-emotional state was assessed using the Luscher color test. Results: We observed a significant increase in visual acuity in children over the specified period indicating the absence of negative effects of LED lighting on the organ of vision. The results of the Lusher test proved the absence of negative dynamics, thus demonstrating null adverse health effects of LED lighting in the primary schoolchildren. The studies confirmed that the influence of that light load on vision and its negative non-visual effects were only potential.

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