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Mining Publication: Do Light-Emitting Diode Cap Lamps Enable Improvements in Miner Safety?
Keywords: Cap lamps Improving visual contrast Reducing glare
Original creation date: October 2009
Authors: JJ Sammarco, MA Reyes, S Gallagher
Peer Reviewed Journal Article - October 2009
Download PDF Document (0.63 MB)
NIOSHTIC2 Number: 20036219
Min Eng 2009 Oct; 61(10):43-49
Proper illumination is critical to a miner's ability to detect hazards in underground mines. Moving hazards are often located in the miner's peripheral field-of-view, while slip/trip/fall hazards are often located in the forward field-of-view. The objective of the research described in this paper was to determine if light-emitting diodes (LEDs) improve visual performance as compared to traditional incandescent (INC) cap lamps. The research presented focuses on comparative studies of a National Institute for Occupational Safety and Health (NIOSH) prototype LED, a commercial LED, and an INC camp lamp. Thirty subjects participated in these studies; ten subjects in each of the age groups: 18 to 25 years, 40 to 50 years, and 51+ years. Visual performance was quantified by the subjects' speed and accuracy in detecting hazards, while visual performance for disability glare was quantified by the use of contrast sensitivity tests. Results suggest that LEDs with a visible spectrum containing a higher concentration of the shorter wavelengths can enable visual performance improvements with respect to disability glare, the detection of moving hazards in the peripheral field-of-view, and the detection of floor hazards in the forward field-of-view. The NIOSH prototype LED cap lamp provided the best visual performance improvements for the older age groups in every test.
Image of publication Do Light-Emitting Diode Cap Lamps Enable Improvements in Miner Safety?Peer Reviewed Journal Article - October 2009
Download PDF Document (0.63 MB)
NIOSHTIC2 Number: 20036219
Min Eng 2009 Oct; 61(10):43-49
See Also
Discomfort Glare Comparison for Various LED Cap Lamps
Evaluation of Glare for Incandescent and LED Miner Cap Lamps in Mesopic Conditions
Experiments on Personal Equipment for Low Seam Coal Miners: IV. Incorporating Coiled Cord Into Cap Lamp Battery Cords
Mine Illumination: A Historical and Technological Perspective
NIOSH Illumination Research Addresses Visual Performance Needs with LED Technology
NIOSH Jupiter II Wide Area Light
The Potential Impact of Light Emitting Diode Lighting on Reducing Mining Injuries During Operation and Maintenance of Lighting Systems
Technological Aspects of Solid-State and Incandescent Sources for Miner Cap Lamps
Visual Performance for Incandescent and Solid-State Cap Lamps in an Underground Mining Environment
Visual Performance for Trip Hazard Detection When Using Incandescent and LED Miner Cap Lamps
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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