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Journal articles on the topic 'Light effect'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

S., DEB, and N. GHOSH (MISS). "THE OZONIZER AND THE "LIGHT EFFECT"." Journal of Indian Chemical Society Vol. 25, Oct 1948 (2022): 449–66. https://doi.org/10.5281/zenodo.6582941.

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The paper first reviews the present state of our knowledge of the so-called "Light Effect" consisting of a sharp decrease of the discharge current in an ozonizer tube on exposure to light. Results of studies made by different workers on the different aspects of the effect, e.g. its dependance on the nature of the gas used, on the intensity and frequency of incident radiation, on the variation of the applied voltage on temperature, on the manner of illumination and on the surface condition of the walls of the discharge space, are collected and systematised. It is shown that for a prop

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2

Lucky, Tonk. "EFFECT OF COLOUR." International Journal of Research - GRANTHAALAYAH Composition of Colours, December,2014 (2017): 1–5. https://doi.org/10.5281/zenodo.888215.

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Colours can stimulate and excite people, increase their appetite, make them feel warm or make them feel tranquil. Red simply makes you excited according to those who study chromo dynamics. Coke’s website is red – it gives you a feel of a lazy, hot summer day – just when you feel the need to drink Coke.There’s more to colours in web design than just the emotional factor. People tend to gamble more under red light conditions than under blue light. Colours have impact on performance. Red lights make people act quicker and feel more powerful, which is not always beneficial, while blue makes people

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3

Guoying Yan, Guoying Yan, Liqing Sun Liqing Sun, Shufang Wang Shufang Wang, and Guangsheng Fu Guangsheng Fu. "Effect of the thickness of light absorption layer on the light-induced transverse thermoelectric effect in Bi2Sr2Co2Oy films." Chinese Optics Letters 13, no. 6 (2015): 063101–63104. http://dx.doi.org/10.3788/col201513.063101.

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4

Kulish, M. R. "Temperature effect on light polarization in uniaxial crystals." Semiconductor Physics Quantum Electronics and Optoelectronics 19, no. 1 (2016): 44–46. http://dx.doi.org/10.15407/spqeo19.01.044.

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5

Hontaruk, O. M. "Low doses effect in GaP light-emitting diodes." Semiconductor Physics Quantum Electronics and Optoelectronics 19, no. 2 (2016): 183–87. http://dx.doi.org/10.15407/spqeo19.02.183.

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6

Tzallas, Paraskevas. "Squeezed light effect." Nature Photonics 17, no. 6 (2023): 463–64. http://dx.doi.org/10.1038/s41566-023-01218-9.

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7

Lee, Hsing-Hao, and Su-Ling Yeh. "Blue light effects on the gap effect." Journal of Vision 19, no. 10 (2019): 71a. http://dx.doi.org/10.1167/19.10.71a.

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8

Desai, Zankhana, and Poorav Desai. "Homoeopathic Treatment Perspective for Adverse Effect of Blue Light." International Journal of Science and Research (IJSR) 11, no. 1 (2022): 273–75. http://dx.doi.org/10.21275/sr22105153245.

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9

James, Steven P., Thomas A. Wehr, David A. Sack, Barbara L. Parry, and Norman E. Rosenthal. "Treatment of Seasonal Affective Disorder with Light in the Evening." British Journal of Psychiatry 147, no. 4 (1985): 424–28. http://dx.doi.org/10.1192/bjp.147.4.424.

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A cross-over comparison study of exposure, in the evenings only, to bright versus dim light was carried out on nine female patients with seasonal affective disorder. A significant antidepressant effect of the bright lights was shown. No consistent observable effects were produced by the dim lights. These results support earlier studies demonstrating the efficacy of bright light given morning and evening. The antidepressant effect of light is not mediated by sleep deprivation, and the early morning hours are not crucial for a response.

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10

Borevitz, Justin O., Julin N. Maloof, Jason Lutes, et al. "Quantitative Trait Loci Controlling Light and Hormone Response in Two Accessions ofArabidopsis thaliana." Genetics 160, no. 2 (2002): 683–96. http://dx.doi.org/10.1093/genetics/160.2.683.

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AbstractWe have mapped quantitative trait loci (QTL) responsible for natural variation in light and hormone response between the Cape Verde Islands (Cvi) and Landsberg erecta (Ler) accessions of Arabidopsis thaliana using recombinant inbred lines (RILs). Hypocotyl length was measured in four light environments: white, blue, red, and far-red light and in the dark. In addition, white light plus gibberellin (GA) and dark plus the brassinosteroid biosynthesis inhibitor brassinazole (BRZ) were used to detect hormone effects. Twelve QTL were identified that map to loci not previously known to affect

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11

Sumon, Karmakar, Zaman Rashed, Nasiruddin M, and Monzur Hossain M. "Effect of different illumination types on in vitro microplants of potato (Solanum tuberosum L.)." European Journal of Biotechnology and Bioscience 6, no. 6 (2018): 76–80. https://doi.org/10.5281/zenodo.5876874.

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As light plays an important role for the development of microplants thus, this investigation was aim to identifying different developmental stages includes shoot length, number of leaves, number of nodes and number of roots under six illumination types (white, blue, red, blue-red, blue-white and red-white). The results reveals that the red light is more effective for increasing shoot length per microplants instead of other light condition and blue light which were reduce the plant height. The highest number of leaf per microplants was obtained under blue light and approximately resemble at the

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12

Chen, Huijun Halabi. "GRAPHIC DESIGN LANGUAGE OF LIGHT EFFECT ART." INTERNATIONAL JOURNAL OF RESEARCH SCIENCE & MANAGEMENT 9, no. 12 (2023): 1–5. https://doi.org/10.5281/zenodo.7533485.

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Light effect art, also known as "op art" and "visual illusion art". Compared with traditional artistic expression, this kind of artistic expression is grasped by people with intuitive visual experience medium, rhythm, color, texture, size, change, consistency, simplicity, complexity and picture processing. For the education and practice of modern art and art design, whether it is in visual communication design, architectural design, interior space design, or furniture display design, light effect art design reflects the relationship between artworks and aesthetic intuition.

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13

Svobodová, J., E. Tůmová, E. Popelářová, and D. Chodová. "Effect of light colour on egg production and egg contamination." Czech Journal of Animal Science 60, No. 12 (2016): 550–56. http://dx.doi.org/10.17221/8597-cjas.

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14

T Idell, Maen. "Melatonin Effect (Under Alternating Light and Injection) On Testicular Tissue." International Journal of Science and Research (IJSR) 7, no. 3 (2018): 1270–76. http://dx.doi.org/10.21275/art2018377.

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15

Maynard, Elizabeth T. "Effect of Light during Cultivation on Weed Emergence." HortScience 32, no. 3 (1997): 428F—429. http://dx.doi.org/10.21273/hortsci.32.3.428f.

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This experiment was conducted to determine whether light conditions during cultivation affect the number or species composition of emerging weeds. Plots were cultivated on 31 May 1996 under the following light conditions: 1) Ambient nighttime light (full moon) plus tractor headlights, 2) ambient nighttime light plus tractor headlights covered by transparent green film (green tractor lights), 3) ambient nighttime light with no tractor headlights, 4) ambient mid-day light. A fifth treatment was not cultivated at all, but was treated with glyphosate on 31 May to kill emerged plants. Results discu

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16

Jiao Wei, Lei Yan-Lian, Zhang Qiao-Ming, et al. "Light-induced magnetoconductance effect in organic light-emitting diodes." Acta Physica Sinica 61, no. 18 (2012): 187305. http://dx.doi.org/10.7498/aps.61.187305.

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17

Zhang Er-Feng and Dai Hong-Yi. "Effect of light polarization on thermal light correlated imaging." Acta Physica Sinica 60, no. 6 (2011): 064209. http://dx.doi.org/10.7498/aps.60.064209.

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18

Hayakawa, M., T. Kinoshita, and A. I. Sanda. "Hadronic Light-by-Light Scattering Effect on Muong−2." Physical Review Letters 75, no. 5 (1995): 790–93. http://dx.doi.org/10.1103/physrevlett.75.790.

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19

Kabir M, Ashraful. "Effect of artificial light on fancy pigeon rearing." Journal of Dairy, Veterinary & Animal Research 8, no. 3 (2019): 136–37. http://dx.doi.org/10.15406/jdvar.2019.08.00255.

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Light either it is natural or artificial both enhances to produce gametes of animals. Light develops pituitary organs then breeding happens. In winter season due to more cold the gonads cannot produce sex hormones. That time artificial lights (bulb) are important for its production. Some breeders use bulb at night for some rare breeds. Nights’ bulb can reduce some flyborne diseases but one problem it that birds cannot get their rest in dark. Though, some rearers switch off those lights (bulb) at the end of night so that birds get some rest. In layer poultry farms the farmers use huge lights fo

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20

Musdarina, Musdarina, Hernawati Hernawati, and Fitriyanti Fitriyanti. "STUDI PERBANDINGAN PENGARUH BERBAGAI WARNA LAMPU DAN BUNYI TERHADAP PERTUMBUHAN SAYURAN SAWI HIJAU (BRASSICA RAPA VAR. PARACHINENSIS L)." JFT : Jurnal Fisika dan Terapannya 6, no. 1 (2019): 16. http://dx.doi.org/10.24252/jft.v6i1.10183.

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Research has been conducted which aims to determine the effect of various colors of LED light and sound effects with frequency of 280Hz-16KHz. This research was conducted by seeding mustard greens for 2 weeks then moving mustard greens to polybags by giving two treatments. First treatment of mustard greens illuminated by LED lights with the color red, yellow, green and the fourth polybag left without the addition of LED light. The second treatment is every 1 polybag of green mustard illuminated by LED lights with red, yellow, green lights at night for 4 hours then exposed to sound in the morni

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21

Lunn, Ryan, Patrice E. Baumhardt, Bradley F. Blackwell, Jean Paul Freyssinier, and Esteban Fernández-Juricic. "Light wavelength and pulsing frequency affect avoidance responses of Canada geese." PeerJ 11 (November 21, 2023): e16379. http://dx.doi.org/10.7717/peerj.16379.

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Collisions between birds and aircraft cause bird mortality, economic damage, and aviation safety hazards. One proposed solution to increasing the distance at which birds detect and move away from an approaching aircraft, ultimately mitigating the probability of collision, is through onboard lighting systems. Lights in vehicles have been shown to lead to earlier reactions in some bird species but they could also generate attraction, potentially increasing the probability of collision. Using information on the visual system of the Canada goose (Branta canadensis), we developed light stimuli of h

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22

Shiffman, Saul, Janine L. Pillitteri, Steven L. Burton, Jeffrey M. Rohay, and Joe G. Gitchell. "Effect of health messages about “Light” and “Ultra Light” cigarettes on beliefs and quitting intent." Tobacco Control 10, suppl 1 (2001): i24—i32. http://dx.doi.org/10.1136/tc.10.suppl_1.i24.

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OBJECTIVETo test the impact of three health messages focusing on vent holes, sensory effects of Light and Ultra Light cigarettes, or health consequences of smoking, respectively, on beliefs and quitting intentions.DESIGNIn the course of a random digit dialed telephone survey, subjects were randomised to hear one of three messages. To test the effects of the messages, beliefs and quitting intentions were assessed both pre- and post-message.PARTICIPANTSDaily smokers (n = 2120) of Regular (46%), Light (39%), and Ultra Light (15%) cigarettes in the USA. The sample was weighted to match the US smok

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23

Clement, Gyeabour Kyere, Okyere Korankye, Duodu Addison, Twumasi Grace, Kwaku Dapaah Philip, and Atta Poku Jnr Patrick. "Effect of light on Guinea fowl (Numida meleagris) production: A review." World Journal of Advanced Research and Reviews 9, no. 3 (2021): 337–45. https://doi.org/10.5281/zenodo.4661789.

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Artificial light is highly recognized and used in Guinea fowl production. In Guinea fowl production, access to light is an important factor for both growth and egg production. The eye is a vital sense organ under neuro-endocrine regulation in order to allow sight in animals. Guinea fowls perceive light through photoreceptors that transform the energy contained in photons in biological signals. In the eye, the energy of the photons is transformed by photosensitive pigments in the cones and rods of the retina, and transmitted through neurons to the brain where signals are integrated in an image.

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24

Dani, Magdolna, Péter Molnár, and Anna Skribanek. "The sensitivity of herbaceous plants to light Pollution." Acta Universitatis de Carolo Eszterházy Nominatae. Sectio Biologiae 46 (2021): 173–81. http://dx.doi.org/10.33041/actauniveszterhazybiol.2021.46.173.

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Plants living near street lights in temperate zones are good examples of the effect of light pollution with a marked shift in leaf fall and bud breaking. Low intensity light (light pollution) is not sufficient for photosynthesis, but can cause changes in many physiological processes, moreover, it can have a disrupting effect on the plant and its connected ecosystem. In this study, physiological effects of light pollution on leaf morphology, leaf anatomy, and photosynthesis were investigated in the herbaceous species Erigeron annuus (L.) Pers. and Fallopia x bohemica (Chrtek et Chrtková) J.P. B

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25

BENDER, Fatma, and Yücel YAZGIN. "THE RELATIONSHIP BETWEEN MATERIAL AND LIGHT IN STAGE DESIGN." SOCIAL SCIENCE DEVELOPMENT JOURNAL 8, no. 38 (2023): 240–63. http://dx.doi.org/10.31567/ssd.929.

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The research, which was carried out to determine the visual effects arising from the interaction of the design materials used in the stage design with light, also aims to observe the results to be obtained by applying them to the surfaces of different materials. This research used qualitative research methods as applied research in the case study model and was prepared for the purpose of collecting data on the post-dramatic physical stage performance named "Pygmalion" staged in the state theatre. The results of the research are important to provide more understanding of the relationship betwee

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26

Lubart, R., H. Friedmann, I. Peled, and N. Grossman. "LIGHT EFFECT ON FIBROBLAST PROLIFERATON." LASER THERAPY 5, no. 2 (1993): 55–57. http://dx.doi.org/10.5978/islsm.93-or-05.

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27

Gomez, J. C., and M. M. Morcos. "Flicker measurement and light effect." IEEE Power Engineering Review 22, no. 11 (2002): 11–15. http://dx.doi.org/10.1109/mper.2002.1045556.

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28

Mullins, J. "Butterfly effect [light emitting diodes]." IEEE Spectrum 43, no. 2 (2006): 14. http://dx.doi.org/10.1109/mspec.2006.1584354.

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29

JANSZKY, J., C. SIBILIA, M. BERTOLOTTI, and Y. YUSHIN. "SWITCH EFFECT OF NONCLASSICAL LIGHT." Le Journal de Physique Colloques 49, no. C2 (1988): C2–337—C2–339. http://dx.doi.org/10.1051/jphyscol:1988280.

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30

Byerley, William F., S. Crair Risch, J. Christian Gillin, et al. "Biological effect of bright light." Progress in Neuro-Psychopharmacology and Biological Psychiatry 13, no. 5 (1989): 683–86. http://dx.doi.org/10.1016/0278-5846(89)90055-9.

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31

SKRABANEK, PETR. "The Antidepressant Effect of Light." American Journal of Psychiatry 142, no. 9 (1985): 1130—b—1130. http://dx.doi.org/10.1176/ajp.142.9.1130-b.

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32

Horiuchi, Noriaki. "Spin Hall effect of light." Nature Photonics 7, no. 1 (2012): 2. http://dx.doi.org/10.1038/nphoton.2012.349.

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33

Drennan, Vari. "Effect of light on dementia." Primary Health Care 18, no. 7 (2008): 6. http://dx.doi.org/10.7748/phc.18.7.6.s9.

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34

Artoni, M., I. Carusotto, G. C. La Rocca, and F. Bassani. "A singular light dragging effect." Journal of Optics B: Quantum and Semiclassical Optics 4, no. 4 (2002): S345—S350. http://dx.doi.org/10.1088/1464-4266/4/4/318.

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35

Tonk, Lucky. "EFFECT OF COLOUR." International Journal of Research -GRANTHAALAYAH 2, no. 3SE (2014): 1–5. http://dx.doi.org/10.29121/granthaalayah.v2.i3se.2014.3554.

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Colours can stimulate and excite people, increase their appetite, make them feel warm or make them feel tranquil. Red simply makes you excited according to those who study chromo dynamics. Coke’s website is red – it gives you a feel of a lazy, hot summer day – just when you feel the need to drink Coke.There’s more to colours in web design than just the emotional factor. People tend to gamble more under red light conditions than under blue light. Colours have impact on performance. Red lights make people act quicker and feel more powerful, which is not always beneficial, while blue makes people

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36

Karnaukhov, Dmitry, Maria Maslennikova, Yana Ermolaeva, et al. "Locomotor activity of the Holarctic molluscs Radix auricularia (from Lake Baikal) in various light pollution conditions." Acta Biologica Sibirica 8 (December 22, 2022): 831–41. https://doi.org/10.5281/zenodo.7749928.

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Light pollution is a modern environmental problem. The scale of light pollution is increasing yearly and is negatively affecting the functioning of terrestrial and aquatic ecosystems. Of the aquatic ecosystems, marine ecosystems are the most studied, while there is very little information on the effect of artificial lighting on freshwater ecosystems. Among freshwater aquatic organisms, there are relatively little data on the effect of artificial light on crustaceans and fish, while we could find no meaningful data on the effect of artificial light on molluscs are practically absent. Here we te

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37

Bin Cao, Bin Cao, Dong Wei Dong Wei, Pei Zhang Pei Zhang, Hong Gao Hong Gao, and and Fuli Li and Fuli Li. "Observing the spin Hall effect of pseudothermal light through weak measurement." Chinese Optics Letters 15, no. 2 (2017): 022401–22405. http://dx.doi.org/10.3788/col201715.022401.

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38

Murty, K. S., and S. K. Dey. "Effect of Low Light on F1 Rice Hybrids." International Rice Research Newsletter 16, no. 4 (1991): 6. https://doi.org/10.5281/zenodo.7218346.

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This article 'Effect of Low Light on F1 Rice Hybrids' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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39

A.F. Kabychenkov and F.V. Lisovsky. "Light-induced flexoantiferomagnetic effect in centroantisymmetric antiferromagnets." Technical Physics 92, no. 3 (2022): 369. http://dx.doi.org/10.21883/tp.2022.03.53267.276-21.

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It is shown that an inhomogeneous circularly polarized light wave induces components of the antiferromagnetism vector in centroantisymmetric antiferromagnets; a narrow beam of light can create a skyrmion. The analysis of the possibility of practical use of the predicted effects is carried out. Keywords: optomagnetic effect, polyharmonic light field, light-induced magnetic field, centroantisymmetric antiferromagnet, circularly polarized light wave, flexoantiferromagnetic effect.

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40

Narla, Shanthi, Indermeet Kohli, Iltefat H. Hamzavi, and Henry W. Lim. "Visible light in photodermatology." Photochemical & Photobiological Sciences 19, no. 1 (2020): 99–104. http://dx.doi.org/10.1039/c9pp00425d.

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Until recently, visible light had been regarded to be without significant photobiologic effect on the skin. However, recent studies demonstrate that measurable effects can be documented in all skin types.

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41

Peng, Xiaolie, Ting Wang, Xingyun Li, and Shibiao Liu. "Effects of light quality on growth, total gypenosides accumulation and photosynthesis in Gynostemma pentaphyllum." Botanical Sciences 95, no. 2 (2017): 235. http://dx.doi.org/10.17129/botsci.667.

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<strong><em>Gynostemma pentaphyllum</em> is a kind of shade–tolerant plants. It can synthesize and accumulate gypenosides in large amounts. The gypenosides are a valuable medicine. To develop effective cultivation techniques of the plant, effects of light quality on growth, accumulation of total gypenosides and photosynthesis in <em>G. pentaphyllum</em> were investigated in this study. Results showed that light quality had remarkable effect on plant growth. White light had a significant effect on the increase in growth, especially in highest biomass, stem diameter

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42

Kim, Jun-Sub, and Ssang-Taek Steve Lim. "LED Light-Induced ROS Differentially Regulates Focal Adhesion Kinase Activity in HaCaT Cell Viability." Current Issues in Molecular Biology 44, no. 3 (2022): 1235–46. http://dx.doi.org/10.3390/cimb44030082.

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In this study, changes in cell signaling mechanisms in skin cells induced by various wavelengths and intensities of light-emitting diodes (LED) were investigated, focusing on the activity of focal adhesion kinase (FAK) in particular. We examined the effect of LED irradiation on cell survival, the generation of intracellular reactive oxygen species (ROS), and the activity of various cell-signaling proteins. Red LED light increased cell viability at all intensities, whereas strong green and blue LED light reduced cell viability, and this effect was reversed by NAC or DPI treatment. Red LED light

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43

de Jong, Maaike, Jenny Q. Ouyang, Arnaud Da Silva, et al. "Effects of nocturnal illumination on life-history decisions and fitness in two wild songbird species." Philosophical Transactions of the Royal Society B: Biological Sciences 370, no. 1667 (2015): 20140128. http://dx.doi.org/10.1098/rstb.2014.0128.

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The effects of artificial night lighting on animal behaviour and fitness are largely unknown. Most studies report short-term consequences in locations that are also exposed to other anthropogenic disturbance. We know little about how the effects of nocturnal illumination vary with different light colour compositions. This is increasingly relevant as the use of LED lights becomes more common, and LED light colour composition can be easily adjusted. We experimentally illuminated previously dark natural habitat with white, green and red light, and measured the effects on life-history decisions an

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44

Qiao, Li, Shibao Guo, Yinli Jin, Chunsheng Wang, Jian Yin, and Shubao Geng. "Effect of Different Light-Emitting Diode (LED) Lights on the Behavior and Habits of Scopulasub punctaria Herrichet Schaeffer." Journal of Biobased Materials and Bioenergy 15, no. 2 (2021): 203–9. http://dx.doi.org/10.1166/jbmb.2021.2029.

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To investigate the phototaxis and photophobism behaviors and the gender differences of S. punctaria in response to different light spectra, 18 lights with wavelengths 370–600 nm were used, and effects of green spectrum (520–525 nm) and yellow spectrum (590–595 nm) on the oviposition, hatching rate, eclosion rate and longevity of S. punctaria (indoor fresh leaf-bred for 5 generations) were studied. The results showed that under the light of 370–665 nm, both female and male adults of S. punctaria had the phototropic and photoevasive behaviors (showed multi peaks), with females tended to orange a

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45

Jadhav, Harish Chaitram, Vishwakarma K. Prashanth, Snehal Sakharam Patil, Gargi Somvanshi, Vaibhav Shinde, and Roshni Prasad. "Knowledge, Awareness, and Attitude Regarding Dental Chair Light among Dental Practitioners in North Maharashtra Region: A Cross-sectional Survey." Journal of Primary Care Dentistry and Oral Health 6, no. 1 (2025): 10–13. https://doi.org/10.4103/jpcdoh.jpcdoh_36_24.

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Abstract Introduction: Dental chair light plays an important role in direct and indirect visibility. Various dental chair lights are available in the market, and dentists should be aware of the advantages and disadvantages of those lights. Protecting one’s eyes is extremely important which can be affected by various ways like such as intensity of light and long working hours in light and it may also be a reason for dental ergonomics. Aim and Objective: The aim of the present study was to evaluate the knowledge, awareness, and attitude regarding dental chair light among dental practitioners. Ma

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46

NOMOTO, Rie. "Effect of Light Wavelength on Polymerization of Light-cured Resins." Dental Materials Journal 16, no. 1 (1997): 60–73. http://dx.doi.org/10.4012/dmj.16.60.

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47

Popov, A. A., A. V. Ivanov, and E. Yu Perlin. "Photon avalanche effect in quantum wells: controlling light with light." Journal of the Optical Society of America B 36, no. 11 (2019): 3117. http://dx.doi.org/10.1364/josab.36.003117.

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48

Lebedeva, N. N., B. G. Salamov, and A. Kh Zeinally. "The effect of photoactive light on light scattering in SrTiO3." Physica B+C 145, no. 2 (1987): 205–8. http://dx.doi.org/10.1016/0378-4363(87)90084-2.

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49

Koňák, Č., J. Jakeš, P. Štěpánek, et al. "Effect of multiple light scattering on transmitted and scattered light." Applied Optics 30, no. 33 (1991): 4865. http://dx.doi.org/10.1364/ao.30.004865.

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50

Lewanzik, Daniel, Christian C. Voigt, and Jeroen Minderman. "Transition from conventional to light‐emitting diode street lighting changes activity of urban bats." Journal of Applied Ecology 54, no. 1 (2017): 264–71. https://doi.org/10.5281/zenodo.13450586.

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(Uploaded by Plazi for the Bat Literature Project) Summary Light pollution is rapidly increasing and can have deleterious effects on biodiversity, yet light types differ in their effect on wildlife. Among the light types used for street lamps, light‐emitting diodes (LEDs) are expected to become globally predominant within the next few years. In a large‐scale field experiment, we recorded bat activity at 46 street lights for 12 nights each and investigated how the widespread replacement of conventional illuminants by LEDs affects urban bats: we compared bat activity at municipal mercury vapour

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