Hazard Factors of Bright Blue Light

Paper Summary:

This research paper examines the hazards and risks associated with the use of blue light in the work place. In addition, the paper examines the use of green light in the workplace and the safety issues relating to the use of green light. Also examined is the fact that blue light marketers inform the public that lamps with 'enhanced' UV will ensure better health.

Outline:
Introduction
Aim
Objectives
Hypothesis
Rationale
Methodology
Literature Review
Summary
Recommendation

From the Paper:

"Photometric quantities such as luminance (brightness in cd/cm2 as perceived by a human "standard observer") and illuminance in lux (the "light" falling on a surface) indicate light levels spectrally weighted by the standard photometric visibility curve which peaks at 550 nm for the human eye. To quantify a photochemical effect it is not sufficient to specify the number of photons-per-square-centimeter (photon flux) or the irradiance (W/cm2) since the efficiency of the effect will be highly dependent on wavelength."

Sample of Sources Used:

• Figueiro, M. G., J. D. Bullough, R. H. Parsons, and M. S. Rea. Preliminary Evidence for Spectral Opponency in the Suppression of Melatonin by Light in Humans. Neuroreport, Vol. 15, 2004, pp. 313-316 in: Figueiro, Mariana, Bullough, John D. and Rea, Mark S. (2007) Light isn't just for vision anymore: implications for transportation safety. United States Department of Transportation Lighting Research Center Region 2 University Transportation Research Center Polytechnic Institute 31 Dec 2--7
• Figueiro, M., et al. Demonstration of additivity failure in human circadian phototransduction. Neuro Endocrinology Letters, Vol. 26, 2005, pp. 493-498.
• Ingling, C. R., E. Martinez, and A. L. Lewis. Tonic-Phasic-Channel Dichotomy and Crozier's Law. Journal of the Optical Society of America, Vol. 73, 1983, pp. 183-189 in Figueiro, Mariana, Bullough, John D. and Rea, Mark S. (2007) Light isn't just for vision anymore: implications for transportation safety. United States Department of Transportation Lighting Research Center Region 2 University Transportation Research Center Polytechnic Institute 31 Dec 2--7 Report
• Lack, Leon, Bramwell, Toby, Wright, Helen, and Kemp, Krystyn (2007) Morning blue light can advance the melatonin rhythm in mild delayed sleep phase syndrome
• Sleep and Biological Rhythms 5 (1) , 78-80 doi:10.1111/j.1479-8425.2006.00250.x Light Management for Night Shift Adaptation (2008) The GreenLIGHT System. Online available at: http://www.sunnexbiotech.com/shiftwork/shift%20work.html

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