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The National Institute for Occupational Safety and Health (NIOSH)





Mining Publication: LED Area Lighting to Reduce Glare for Roof Bolter Operators
Keywords: Bolters Glare Lighting Reducing glare
Original creation date: June 2020
Authors: J Sammarco, A Mayton, E Rubinstein
Peer Reviewed Journal Article - June 2020
Go to Web Page
NIOSHTIC2 Number: 20058898
Min Metall Explor 2020 Jun; 37(3):851-860
Researchers from the National Institute for Occupational Safety and Health (NIOSH) developed a light-emitting diode (LED) area luminaire called the Saturn and conducted a laboratory study using a Fletcher High Dual-boom Mast Feed (HDDR) roof bolting machine. The Saturn luminaire was designed to (1) enhance floor illumination to enable better detection of trip hazards in the interior spaces of a roof bolter and (2) reduce glare that has typically been an issue of concern on roof bolters. This paper reports on the results of achieving the second objective. The existing roof bolter lighting was the baseline and was compared with three versions of the Saturn luminaire relative to light intensity (100%, 75%, and 50%). Discomfort and disability glare data were obtained from 30 participants that comprised three age groups. Discomfort glare perceptions were obtained using the De Boer rating scale, and disability glare was quantified by using Mars Letter Contrast Sensitivity tests. Discomfort glare was reduced at least 3 levels with all Saturn versions. Also, a predictive model was used to estimate discomfort glare, and the results were similar. Disability glare was the least for the Saturn’s 50% intensity, and all Saturn versions had significantly less disability glare than with the baseline lighting. Veiling luminance was calculated and used as another indicator of disability glare. Veiling luminance was 28 to 42 times greater with the baseline lighting as compared with that of the Saturn lighting. Lastly, visibility levels were calculated. The Saturn versions were 4 to 6.5 times better in terms of visibility level.
First page of LED Area Lighting to Reduce Glare for Roof Bolter Operators Peer Reviewed Journal Article - June 2020
Go to Web Page
NIOSHTIC2 Number: 20058898
Min Metall Explor 2020 Jun; 37(3):851-860
See Also
Discomfort Glare Comparison for Various LED Cap Lamps
LED Lighting for Improving Trip Object Detection for a Walk-thru Roof Bolter
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
Roof Screening: Best Practices and Roof Bolting Machines
The Saturn LED Area Light Provides Improved Illumination for Greater Roof Bolter Safety
Technology News 560 - The Saturn LED Area Light Provides Improved Illumination for Greater Roof Bolter Safety
Underground Coal, Metal, and Nonmetal Mine Illumination Systems for Improving Miner Visual Performance
Verification and Validation of Roof Bolter Simulation Models for Studying Events Between a Machine and its Operator
Page last reviewed: March 2, 2022
Page last updated: March 2, 2022
Content source: National Institute for Occupational Safety and Health, Mining Program
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