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Energy Focus Position on LED Street Lighting

July 1, 2016

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Characterizing Photometric Flicker

March 1, 2016

The focus of this study is simply to report on the commercial availability and performance of emerging flicker meters. Commercial-meter measurements and calculations were compared against those generated by a photoelectric characterization system developed by the Pacific Northwest National Laboratory (PNNL). The results and analysis show that the three commercially available flicker meters evaluated for […]

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Ultraviolet Radiation as a Risk Factor for Cataract and Macular Degeneration

October 7, 2015

The human eye is constantly exposed to sunlight and artificial lighting. Light transmission through the eye is fundamental to its unique biological functions of directing vision and circadian rhythm, and therefore, light absorbed by the eye must be benign. However, exposure to the intense ambient radiation can pose a hazard particularly if the recipient is over 40 years of age. […]

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PHOTOBIOLOGY of the HUMAN LENS

October 7, 2015

Introduction The primary function of the human lens is to focus light undistorted onto the retina. While the transmission properties of most of the components of the eye are stable, the transmission properties of the lens change throughout life, as seen in Figure 1. Figure 1. The changes in the human lens throughout life. Pictured are at birth, 40 […]

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Effects of four workplace lighting technologies on perception, cognition and affective state

October 7, 2015

Light-emitting diodes (LED) are becoming an increasingly common lighting option for industrial applications, offering superior power efficiency and longevity relative to conventional fluorescent technologies. This study examined the visual perceptual, affective and cognitive implications of equipping temporary military shelters with either fluorescent or one of three advanced LED lighting systems with varied color temperature and luminance. Twenty-four volunteers were […]

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Alerting effects of light

October 7, 2015

Light exerts powerful non-visual effects on a wide range of biological functions and behavior. In humans, light is intuitively linked with an alert or wakeful state. Compared to the effects of light on human circadian rhythms, little attention has been paid to its acute alerting action. Here I summarize studies from the past two decades, which have defined and […]

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The Macular Degeneration Epidemic: Beyond UV Protection

September 21, 2015

The number of people with Age-related Macular Degeneration (AMD) will increase significantly over the next 20 years. The statistics are startling; 2.7 million Americans will develop Dry AMD, and 210,000 will develop wet AMD each year through the year 2050. There currently are 2,321 Retinal Specialists registered with the American Academy of Ophthalmology. Some quick, […]

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Which Lamp Costs You More?

September 2, 2015

Replace a standard 32W fluorescent lamp with an Energy Focus 15 Intellitube® Series LED lamp and you’ll save 17W-more than half the power. Let’s say your office has lights on an average of 12 hours a day. That’s 84 hours a week and 52 weeks a year for a total of 4,368 hours a year. […]

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The Lowly Lightbulb Outshines Solar and Wind on U.S. Power Grids

September 1, 2015

Utility and power grid managers in the U.S. are learning that the best way to cut carbon emissions and improve efficiency is the easiest: Just change your lightbulbs. The nation’s largest grid, serving more than 61 million customers from Washington to Chicago, is revising its demand forecasts after recognizing that better lighting has undercut its […]

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Eye Disease Resulting From Increased Use of Fluorescent Lighting as a Climate Change Mitigation Strategy

September 1, 2015

Increased use of fluorescent lighting as a climate change mitigation strategy may increase eye disease. The safe range of light to avoid exposing the eye to potentially damaging ultraviolet (UV) radiation is 2000 to 3500K and greater than 500 nanometers. Some fluorescent lights fall outside this safe range. Fluorescent lighting may increase UV-related eye diseases […]

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Which Child Will Have The Higher Test Score?

September 1, 2015

Over 50% of children and adults with reading, learning, or attention problems have Scotopic Sensitivity Syndrome – a disorder which affects messages from the eye to the brain. Fluorescent lighting contains many disruptive wave-lengths of light, which adversely affect the transfer of messages from the eye to the brain. Filtering out these specific  wave lengths of […]

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Light & Ocular Health

September 1, 2015

Cataracts is a clouding of the lens inside the eye which leads to a decrease in vision. It is the most common cause of blindness and is conventionally treated with surgery. Visual loss occurs because opacification of the lens obstructs light from passing and being focused on the retina at the back of the eye. […]

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