Discomfort Glare Comparison for Various LED Cap Lamps

Details

• Personal Author:
  Gallagher S ; Lutz T ; Mayton, Alan G. ; Sammarco, John J.
• Description:
  Researchers at the National Institute for Occupational Safety and Health (NIOSH) are investigating different lighting technologies with the objective of improving mine safety. This paper presents the results from an ongoing study that compares discomfort glare for different light-emitting diode (LED) cap lamps using the de Boer glare rating scale. The cap lamps tested included two commercially-available LED cap lamps and one NIOSH prototype LED cap lamp tested at three different illumination levels. Prior research indicated that the NIOSH prototype enabled much better visual performance as compared to other LED cap lamps. It uses three LEDs that produce multiple illumination areas in comparison to commercially-available cap lamps that use one LED and projects a narrow spot pattern. Across subjects and cap lamp test conditions, measured illuminances (averaged at both eyes) varied from 0.62 to 3.73 lx, whereas the de Boer glare ratings varied from 4.86 to 7.71. An analysis of variance based on 15 subjects indicated a significant difference in the discomfort glare due to cap lamps (F-4,F-52 = 18.01, p < 0.001). Post hoc tests indicate that one of the commercially available cap lamps exhibited lower discomfort scores, with no statistically significant differences detected between the others. Thus, the NIOSH prototype cap lamp does not cause excessive discomfort glare yet enables better visual performance. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Eye Lighting Mining Occupational Health Risk Assessment Safety Safety Management Sense Organs Workplace

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• Keywords:
  Coal-miners Coal-mining Control-technology Equipment-design Injuries Injury-prevention Light-properties Light-source Lighting-systems Mine-workers Miners Mining-equipment Mining-industry Quantitative-analysis Risk-analysis Safety-equipment Safety-measures Safety-practices Statistical-analysis Underground-miners Underground-mining Visual-fields Visual-perception Work-analysis Work-environment Work-operations Work-performance Work-practices Worker-motivation Workplace-studies

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• Series:
  Mining Publications
• ISSN:
  0093-9994
• Publisher:
  Institute of Electrical and Electronics Engineers
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  47
• Issue:
  3
• NIOSHTIC Number:
  nn:20038907
• Citation:
  IEEE Trans Ind Appl 2011 May/Jun; 47(3):1168-1174
• Contact Point Address:
  John J. Sammarco, National Institute for Occupational Safety and Health (NIOSH), OMSHR, Pittsburgh, PA 15236
• Email:
  Jsammarco@cdc.gov
• Federal Fiscal Year:
  2011
• Peer Reviewed:
  True
• Source Full Name:
  IEEE Transactions on Industry Applications
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8f1898f089db0a12440d2b003622f42833d8360aa047293430e31509ebc3c8f8425f88e69ec59d0611e7fe8175f51fcd513b3a18ce9401ef9e94cff8757f6a64
• Download URL:
  https://stacks.cdc.gov/view/cdc/227326/cdc_227326_DS1.pdf
• File Type:
  [PDF - 458.09 KB ]