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Author Jin-Joo Lee, Seong-Sik Yoo, Ho-Seok Kang, Dong-Hee Kim, Jin-Ho Nam, Hyun-Ji Kim, Hoon Kim url  openurl
  Title A Research on Visual Performance at Different Ages Depending on Color Temperature of Headlights Type Journal Article
  Year 2017 Publication Journal of the Korean Institute of Illuminating and Electrical Installation Engineers Abbreviated Journal  
  Volume 31 Issue 8 Pages 40-48  
  Keywords Lighting  
  Abstract Under night-time driving conditions, both cones and rods in eye’s retina simultaneously act to influence mesopic vision in two areas: central and peripheral visions. However, as people age, the amount of light received as well as the color temperature perceived by the human eyes also change. This research, through simulations and scaled down experiments with various headlight color temperatures and two levels of fixed brightness, deals with differences in ability to detect and identify obstacles by the subjects in their 20’s and 50’s.

According to the results obtained from the experiments on peripheral vision, subjects in their 20’s detected the obstacles more quickly at the combined color temperature of 3,000K+4,500K than at the single color temperature of 4,500K, and likewise at 3,000K+5,500K than at 5,500K; this tendency was significantly more noticeable for the subjects in their 50’s. As for the central vision, the results showed that there were no significant differences due to color temperature between the subjects in their 20’s and those in their 50’s. Moreover, the landolt ring experiment conducted under low luminance yielded higher percentage of correct answers at combined color temperatures.
 
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  Call Number LoNNe @ kyba @ Serial 1743  
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Author Bullough, J.D. url  doi
openurl 
  Title Human Factors Impacts of Light-Emitting Diode Airfield Lighting Type Journal Article
  Year 2017 Publication Transportation Research Record: Journal of the Transportation Research Board Abbreviated Journal Transportation Research Record: Journal of the Transportation Research Board  
  Volume 2626 Issue Pages 51-57  
  Keywords Lighting  
  Abstract Light-emitting diodes (LEDs) differ from incandescent light sources in several ways that are relevant to energy and maintenance requirements of airfield lighting systems. They have higher luminous efficacy and, when designed properly, have longer useful operating lives; both factors make LEDs attractive candidates for airfield lighting. The photometric, colorimetric, and temporal characteristics of LEDs also differ from those of incandescent light sources, and these can have important implications for the appearance of runway and taxiway lighting systems. The present paper reviews publications summarizing experimental and analytical investigations designed to assess these implications with respect to the following human factors impacts: color identification, brightness and glare, visibility in fog and haze, response to onset of flashing lights, and stroboscopic effects such as the phantom array. Overall, this review of experimental evidence suggests that, in addition to their reduced energy use and maintenance requirements, LED airfield lighting can be advantageous in comparison with incandescent lighting systems used to delineate airport runways and taxiways.  
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  ISSN 0361-1981 ISBN Medium  
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  Notes Approved no  
  Call Number LoNNe @ kyba @ Serial 1758  
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Author Bullough, J.D. url  doi
openurl 
  Title Spectral sensitivity for extrafoveal discomfort glare Type Journal Article
  Year 2009 Publication Journal of Modern Optics Abbreviated Journal Journal of Modern Optics  
  Volume 56 Issue 13 Pages 1518-1522  
  Keywords Vision; Lighting  
  Abstract Previously published evidence suggests that the discomfort glare response to bright lights has greater short-wavelength spectral sensitivity than implied by the photopic luminous efficiency function, V(λ). The present paper summarizes a series of experiments to characterize spectral sensitivity for discomfort glare from nearly monochromatic light sources presented in the near extrafovea (5° and 10° off-axis). The results are consistent with increased participation in the discomfort glare response from short-wavelength cones and greater short-wavelength sensitivity as eccentricity increases. From the results an empirical family of luminous efficiency functions, V DG(λ), for discomfort glare, is derived. Such data could have implications for specifications of roadway lighting, vehicle headlamps or other light sources that might contribute to discomfort glare.  
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  ISSN 0950-0340 ISBN Medium  
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  Notes Approved no  
  Call Number LoNNe @ kyba @ Serial 1759  
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Author John D. Bullough url  openurl
  Title Opinion: Will road lighting wither? Type Journal Article
  Year 2017 Publication Lighting Research & Technology Abbreviated Journal  
  Volume 49 Issue Pages 672  
  Keywords Commentary; Lighting  
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  Notes Approved no  
  Call Number LoNNe @ kyba @ Serial 1761  
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Author John Bullough url  doi
openurl 
  Title Factors Affecting Sign Visibility, Conspicuity, and Legibility: Review and Annotated Bibliography Type Journal Article
  Year 2017 Publication Interdisciplinary Journal of Signage and Wayfinding Abbreviated Journal  
  Volume 1 Issue 2 Pages 2-25  
  Keywords Lighting  
  Abstract This paper summarizes published research studies, technical reports and codes and standards related to the visibility (i.e., conspicuity and legibility) of signage. In the summary that follows, publications are grouped and discussed according to several different topics. First, the typographic and symbolic characteristics of signs and the information they carry are described (e.g., letter size, font selection, etc.); second, photometric, colorimetric and temporal properties of signs as they affect visibility; finally, environmental considerations (e.g., daytime versus nighttime viewing, whether a sign is located in a rural or urban area, etc.) as they influence sign design are reviewed. Annotated summaries of each publication in the literature review are included at the end of this paper.  
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  Notes Approved no  
  Call Number LoNNe @ kyba @ Serial 1762  
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