Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Do light-emitting diode cap lamps enable improvements in miner safety?

Sammarco-J; Reyes-MA; Gallagher-S
2009 SME Annual Meeting and Exhibit, February 22-25, Denver, Colorado, Preprint 09-090. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2009 Feb; :1-5
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.
Mining-industry; Mining-equipment; Underground-mining; Lighting; Lighting-systems; Safety-equipment; Injury-prevention; Accident-prevention
Publication Date
Document Type
Conference/Symposia Proceedings
Fiscal Year
NTIS Accession No.
NTIS Price
NIOSH Division
Priority Area
Source Name
2009 SME Annual Meeting and Exhibit, February 22-25, Denver, Colorado, Preprint 09-090