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Influence of LED Spectral Characteristics on Glare Recovery
Technical Paper
2019-01-0845
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Headlight glare is a major concern of the driving public. In the past couple of years there have been concerns expressed about the use of light emitting diode (LED) lighting technologies and possible impacts LEDs may have on people, including circadian disruption, retinal hazards, and glare. Under typical use cases, vehicle headlight exposures are insufficient to cause circadian disruption or retinal damage, but can result in disability and discomfort glare, as well as glare recovery. In general, white LEDs used for illumination have greater short-wavelength content than halogen lamps used in many headlights, and short wavelengths have been implicated in visual discomfort from bright lights at night. Previous literature is inconsistent regarding whether the spectral (color) content of a glare source affects the amount of recovery time needed to see objects, following exposure to a bright light such as a vehicle headlight. Warm and cool white LEDs were used as glare sources in the present study. They were energized and exposed to study participants at one of two illuminances (low, high) for either 3 or 6 seconds, after which participants were asked to identify the orientation of a Landolt ring target located on a display screen behind the glare source. Identification times were unaffected by the spectral content of the LED, but were correlated with the "dosage" of light from the glare sources, defined as the product of illuminance and duration. Although cool white LEDs will tend to be judged as creating more discomfort than warm white LEDs, they do not result in longer glare recovery times under the range of conditions used in this study.
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Citation
Skinner, N. and Bullough, J., "Influence of LED Spectral Characteristics on Glare Recovery," SAE Technical Paper 2019-01-0845, 2019, https://doi.org/10.4271/2019-01-0845.Also In
References
- RAC Limited Motorists Claim to Being Regularly Left Dazzled by Modern Vehicle Headlights Walsall, UK RAC Limited 2018
- American Medical Association 2016
- Crucchiola , J. Wired.com February 10, 2016
- Fry , G.A. A Re-Evaluation of the Scattering Theory of Glare Illuminating Engineering 49 2 98 102 1954
- Rea , M.S. Lighting Handbook: Reference and Application 9th New York, NY Illuminating Engineering Society 2000
- Irikura , T. , Toyofuku , Y. , and Aoki , Y. Recovery Time of Visual Acuity after Exposure to a Glare Source Lighting Research and Technology 31 2 57 61 1999
- Steen , R. , Whitaker , D. , Elliott , D.B. , and Wild , J.M. Effect of Filters on Disability Glare Ophthalmic and Physiological Optics 13 371 376 1993
- Flannagan , M.J. 1999
- Bullough , J.D. , Fu , Z. , and Van Derlofske , J. Discomfort and Disability Glare from Halogen and HID Headlamp Systems SAE Technical Paper 2002-01-0010 2002 2002 10.4271/2002-01-0010
- Bullough , J.D. , Van Derlofske , J. , Dee , P. , Chen , J. and Akashi , Y. 2003
- Bullough , J.D. Developing a Better Understanding of Discomfort Glare: Cause and Effect Proceedings of the 12th International Symposium on Automotive Lighting 2017 705 714 Darmstadt, Germany Herbert Utz
- Flannagan , M.J. , Sivak , M. , Gellatly , A. , and Luoma , J. 1992
- Flannagan , M.J. , Sivak , M. , Ensing , M. , and Simmons , C.J. 1989
- Van Derlofske , J. and Bullough , J.D. Spectral Effects of LED Forward Lighting: Visibility and Glare SAE Technical Paper 2006-01-0102 2006 2006 10.4271/2006-01-0102
- Bullough , J.D. Spectral Sensitivity for Extrafoveal Discomfort Glare Journal of Modern Optics 56 13 1518 1522 2009
- Sivak , M. , Schoettle , B. , Minoda , T. , and Flannagan , M.J. Short-Wavelength Content of LED Headlamps and Discomfort Glare Leukos 2 2 145 154 2005
- Reading , V. Yellow and White Headlamp Glare and Age Transactions of the Illuminating Engineering Society (London) 31 4 108 121 1966
- Smart , A.E. An Investigation of Glare from White and Yellow Sources Lighting Research and Technology 1 2 106 109 1969
- Jin , H. , Jin , S. , Chen , L. , Cen , S. , and Yuan , K. Research on the Lighting Performance of LED Street Lights with Different Color Temperatures IEEE Photonics Journal 7 6 1601309 2015
- Van Derlofske , J. , Chen , J. , Bullough , J.D. , and Akashi , Y. Headlight Glare Exposure and Recovery SAE Technical Paper 2005-01-1573 2005 2005 10.4271/2005-01-1573
- Skinner , N.P. and Bullough , J.D. Visual Recovery and Discomfort Following Exposure to Oncoming Headlamps SAE Int. J. Passeng. Cars - Mech. Syst. 2 1 745 749 2009 10.4271/2009-01-0546