| Records |
| Author |
Gao, X.; Li, X.; Zhang, M.; Chi, L.; Song, C.; Liu, Y. |
| Title |
Effects of LED light quality on the growth, survival and metamorphosis ofHaliotis discus hannaiIno larvae |
Type |
Journal Article |
| Year |
2016 |
Publication |
Aquaculture Research |
Abbreviated Journal |
Aquac Res |
| Volume |
47 |
Issue |
12 |
Pages  |
3705–3717 |
| Keywords |
Animals; Haliotis discus hannai Ino; larva; LED light quality; initial stage of lighting; embryonic development; abalone; photobiology |
| Abstract |
Light is a key environmental factor influencing the growth, development and survival of aquatic organisms. We examined the effects of different light qualities (red, orange, white, blue, green or no light) and developmental stage at initial lighting [fertilized egg (FE), trochophore larva (TL), or eye-spot larva (EL)] on the growth, development, and survival of larvae of the Pacific abalone Haliotis discus hannai Ino. Larva-hatching success was significantly higher under blue, green, or no light compared with red, orange or white light (P < 0.05). Larval abnormalities were significantly increased under red, orange or white light compared with all other light qualities (P < 0.05). The incidence of metamorphosis in larvae illuminated from the TL stage was significantly higher under blue compared with other light qualities. Irrespective of the stage at initial illumination, the incidence of metamorphosis was lower in larvae cultured under red, orange or no light compared with other light qualities, but the differences were not significant (P > 0.05). Juvenile survival was significantly higher under blue or green compared with other light qualities (P < 0.05), with no significant effect of stage at initial illumination (P > 0.05). Larval size at completion of the shell was unaffected by stage at initial illumination, but was greater under blue or green light, while size at metamorphosis was greatest following illumination with blue or green light since the TL or EL stage (P < 0.05). Metamorphosis time was shortest with blue or green light and in cultures illuminated from the FE or TL stage (P < 0.05). Larval development from the FE to formation of the fourth tubule on the cephalic tentacles was fastest in larvae exposed since the FE or TL stage to blue or green light, compared with other light qualities (P < 0.05). However, there was no difference in terms of the rate of development from the FE to the TL stage between cultures lit or unlit since the FE egg stage (P > 0.05). These results suggest that a blue or green light source applied from the TL stage can increase the hatching and yield of H. discus hannai Ino, with important implications for the development of the aquaculture industry. |
| Address |
Research and Development Center of Marine Biotechnology, Institute of Oceanology, Chinese Academy of Science, 7 Nanhai Road, Qingdao 266071, Shandong Province, China; 18354292961(at)163.com. |
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Thesis |
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| Publisher |
Wiley |
Place of Publication |
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| Language |
English |
Summary Language |
English |
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| ISSN |
1355557X |
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Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
1340 |
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| Author |
Zielinska-Dabkowska, K.M.; Xavia, K. |
| Title |
Global Approaches to Reduce Light Pollution from Media Architecture and Non-Static, Self-Luminous LED Displays for Mixed-Use Urban Developments |
Type |
Journal Article |
| Year |
2019 |
Publication |
Sustainability |
Abbreviated Journal |
Sustainability |
| Volume |
11 |
Issue |
12 |
Pages |
3446 |
| Keywords |
Lighting |
| Abstract |
Urban environments have become significantly brighter and more illuminated, and cities now consider media architecture and non-static, self-luminous LED displays an essential element of their strategy to attract residents, visitors, and tourists in the hours after dark. Unfortunately, most often, they are not designed with care, consideration, and awareness, nor do they support the visual wellbeing and circadian rhythms of humans. They also increase light pollution which has an adverse effect on the environment. The aim of this study was to estimate the scale of the negative impact of 28 non-static, self-luminous LED shop window displays within a real-life city context along the main shopping street Banhofstrasse in Zurich, Switzerland. An experimental field measurement survey investigation was performed to identify visual luminance with commonly available tools such as a luminance meter and a digital reflex camera for luminance photography. Moreover, the most important global approaches to reduce light pollution were evaluated in the form of existing guidelines, technical standards, and laws, all of which should be considered when specifying illuminated digital advertisements. A literature review and survey results both confirmed the extent of the problem and highlighted, too, the need to better measure, apply, and manage this new technology. The authors’ proposal for improvements involve practical recommendations for the design and implementation of future projects which can positively guide and direct this growing trend. |
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Series Issue |
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Edition |
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| ISSN |
2071-1050 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
2601 |
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| Author |
Ho, C.Y.; Lin, H.T.; Huang, K.Y. |
| Title |
A Study on Energy Saving and Light Pollution of LED Advertising Signs |
Type |
Journal Article |
| Year |
2011 |
Publication |
Applied Mechanics and Materials |
Abbreviated Journal |
Amm |
| Volume |
121-126 |
Issue |
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Pages |
2979-2984 |
| Keywords |
Advertising Sign; LED; Light Trespass; Luminance Limit; Saving Energy; Vertical Illuminance; *Lighting |
| Abstract |
Lighting advertising signs not only play an important role in outdoor lighting environment in Taiwan, but also become the main factor of energy consumption in urban areas at night. Light-emitting diode (LED) has been gradually used in advertising signs due to its advantages. However, in order to be conspicuous and legible in the daytime, signs that are excessively bright may result in considerable light pollution and energy waste at nighttime. Therefore, this research aims to measure the luminance of LED signs and traditional internally lighted signs, and analyze the light trespass from each signage. Based on the research results, the energy consumption from a LED full color screen is 12 times more than a traditional internally lighted sign per day. Statistically, all kinds of LED signs are much higher than traditional internally lighted signs in the percentage of excessive brightness and average luminance value. As for the light trespass, since the vertical illuminance on facade facing the signs increases with the increase of the sign area or the decrease of the distance between the sign and the facade, the vertical illuminance on facade facing the signs would exceed the limit of CIE even if the luminance of the signs achieves the standard of CIE in terms of the general conditions in Taiwan. This happens to LED full color screens in particular and thus results in considerable obtrusive light. To sum up, in order to reduce unnecessary energy consumption and improve the nighttime lighting quality for outdoor environment, this research recommends the luminance limitation for light dimming of LED advertising signs should refer to the zoning, time period, and sign area. |
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Series Issue |
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Edition |
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| ISSN |
1662-7482 |
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no |
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IDA @ john @ |
Serial |
126 |
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| Author |
Yoon, H.C.; Oh, J.H.; Lee, S.; Park, J.B.; Do, Y.R. |
| Title |
Circadian-tunable Perovskite Quantum Dot-based Down-Converted Multi-Package White LED with a Color Fidelity Index over 90 |
Type |
Journal Article |
| Year |
2017 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci Rep |
| Volume |
7 |
Issue |
1 |
Pages |
2808 |
| Keywords |
Lighting |
| Abstract |
New metrics of the color and circadian performances of down-converted white light-emitting diodes (DC-WLEDs) are rapidly becoming popular in smart lighting systems. This is due to the increased desire for accurate analytical methods to measure the effects of newly developed quantum dot (QD)-based lighting on the vision, color, and circadian sensors of retina cells in the human eye. In this regard, a two-measure system known as technical memorandum TM-30-2015 (Illuminating Engineering Society of North America), encompassing the color fidelity index (CFI, R f ) and the color gamut index (CGI, R g ), has been developed as a new metrics of color to replace the currently utilized color rendering index (CRI, R a ). In addition, the tunability of the circadian efficacy of radiation (CER) is now more important due to its effect on the control of melatonin suppression/secretion, resetting of the central/local clocks of individuals given their daily cycles, and benefits to human health. In this paper, we developed and analyzed six-colored perovskite (Pe; cyan, green, yellowish green, amber, orange, and red colors) QDs-based multi-package WLED, and optimized the SPDs of tunable PeQD-based multi-package WLEDs in terms of promising human-centric lighting device, given its optimized visual energy, color qualities and health-promoting effects. |
| Address |
Department of Chemistry, Kookmin University, Seoul, 136-702, Republic of Korea. yrdo@kookmin.ac.kr |
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English |
Summary Language |
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Original Title |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
2045-2322 |
ISBN |
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| Notes |
PMID:28584229; PMCID:PMC5459832 |
Approved |
no |
| Call Number |
LoNNe @ kyba @ |
Serial |
1667 |
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| Author |
Kayumov, L.; Casper, R.F.; Hawa, R.J.; Perelman, B.; Chung, S.A.; Sokalsky, S.; Shapiro, C.M. |
| Title |
Blocking low-wavelength light prevents nocturnal melatonin suppression with no adverse effect on performance during simulated shift work |
Type |
Journal Article |
| Year |
2005 |
Publication |
The Journal of Clinical Endocrinology and Metabolism |
Abbreviated Journal |
J Clin Endocrinol Metab |
| Volume |
90 |
Issue |
5 |
Pages |
2755-2761 |
| Keywords |
Lighting; Adult; *Circadian Rhythm; Female; Humans; *Light; Male; Melatonin/*secretion; *Work Schedule Tolerance |
| Abstract |
Decreases in melatonin production in human and animals are known to be caused by environmental lighting, especially short-wavelength lighting (between 470 and 525 nm). We investigated the novel hypothesis that the use of goggles with selective exclusion of all wavelengths less than 530 nm could prevent the suppression of melatonin in bright-light conditions during a simulated shift-work experiment. Salivary melatonin levels were measured under dim (<5 lux), bright (800 lux), and filtered (800 lux) light at hourly intervals between 2000 and 0800 h in 11 healthy young males and eight females (mean age, 24.7 +/- 4.6 yr). The measurements were performed during three nonconsecutive nights over a 2-wk period. Subjective sleepiness was measured by self-report scales, whereas objective performance was assessed with the Continuous Performance Test. All subjects demonstrated preserved melatonin levels in filtered light similar to their dim-light secretion profile. Unfiltered bright light drastically suppressed melatonin production. Normalization of endogenous melatonin production while wearing goggles did not impair measures of performance, subjective sleepiness, or alertness. |
| Address |
Sleep Research Laboratory, Department of Psychiatry, University Health Network, ECW 3D-035, 399 Bathurst Street, Toronto, Ontario, Canada M5T 2S8. lkayumov@uhnres.utoronto.ca |
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English |
Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0021-972X |
ISBN |
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Expedition |
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Conference |
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| Notes |
PMID:15713707 |
Approved |
no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
640 |
| Permanent link to this record |
