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Bellia, L.; Seraceni, M. |
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Title |
A proposal for a simplified model to evaluate the circadian effects of light sources |
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Journal Article |
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Year |
2014 |
Publication |
Lighting Research and Technology |
Abbreviated Journal |
Lighting Research and Technology |
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46 |
Issue |
5 |
Pages |
493-505 |
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Lighting |
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1477-1535 |
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LoNNe @ schroer @ |
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571 |
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Author |
Bennett, S.; Alpert, M.; Kubulins, V.; Hansler, R.L. |
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Title |
Use of modified spectacles and light bulbs to block blue light at night may prevent postpartum depression |
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Journal Article |
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Year |
2009 |
Publication |
Medical Hypotheses |
Abbreviated Journal |
Med Hypotheses |
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Volume |
73 |
Issue |
2 |
Pages |
251-253 |
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Keywords |
Depression, Postpartum/*prevention & control; *Eyeglasses; Female; Humans; *Lighting; blue light; light therapy; blue blocker |
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Abstract |
In 2001 it was discovered that exposing the eyes to light in the blue end of the visible spectrum suppresses the production of the sleep hormone, melatonin. New mothers need to get up during the night to care for their babies. This is the time when melatonin is normally flowing. Exposing their eyes to light can cut off the flow. It may also reset their circadian (internal) clock. On subsequent nights the melatonin may not begin flowing at the normal time making it difficult to fall asleep. Over time, disruption of the circadian rhythm plus sleep deprivation may result in depression. Women suffering postpartum depression were enrolled in a small clinical trial. Some were provided with glasses and light bulbs that block blue light. Others were equipped with glasses and light bulbs that looked colored but did not block the rays causing melatonin suppression. Those with the “real glasses” recovered somewhat more quickly than those with the placebo glasses and light bulbs. The hypothesis that should be tested in large scale clinical trials is that the risk of postpartum depression can be reduced when a new mother avoids exposing her eyes to blue light when she gets up at night to care for her baby. In the meantime, all new mothers may benefit from using glasses and light bulbs that block blue light when getting up at night to care for their babies. |
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Postpartum Support, International P.O. Box 60931, Santa Barbara, CA 93160, USA |
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0306-9877 |
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PMID:19329259 |
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no |
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IDA @ john @ |
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296 |
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Author |
Bensch, G.; Peters, J.; Sievert, M. |
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Title |
The lighting transition in rural Africa — From kerosene to battery-powered LED and the emerging disposal problem |
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Journal Article |
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Year |
2017 |
Publication |
Energy for Sustainable Development |
Abbreviated Journal |
Energy for Sustainable Development |
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39 |
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Pages |
13-20 |
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Keywords |
Lighting; Energy |
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People without electricity access, numbering today more than 500 million in rural Africa alone, have been using dim and sooty kerosene lamps and candles for their lighting purposes for decades. In the present paper, current lighting usage patterns are systematically assessed using detailed new survey data from seven countries across Sub-Saharan Africa. The data makes evident that a transition has taken place in recent years, both unnoticed by and without external support from governmental or non-governmental organizations: the rural population without electricity in Africa has replaced kerosene lights and candles by simple, yet more efficient and cleaner LED lamps powered by non-rechargeable batteries. Nevertheless, we also show that the discharged batteries are generally disposed of inappropriately in latrines or the nature. The toxic content of many dry-cell batteries and their accumulation at local litter hotspots may have harmful repercussions on health and the environment. We conclude by suggesting that rapid action is needed to, first, install an effective monitoring system on batteries that enter the continent and, second, put in place an appropriate waste management system. |
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0973-0826 |
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no |
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Call Number |
GFZ @ kyba @ |
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2193 |
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Author |
Beu, D.; Ciugudeanu, C. |
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Title |
Energy Efficiency Lighting – Romania |
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Journal Article |
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Year |
2015 |
Publication |
Romanian Journal of Building Services |
Abbreviated Journal |
Romanian J. of Building Services |
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1 |
Issue |
3 |
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1-7 |
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Keywords |
Energy; Romania; architecture; sustainability; sustainable lighting |
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The paper presents the Romanian experience, which is unique in promoting green
buildings and the impact for lighting. Without prior experience, situation has changed with the new Romanian Green Building Council, founded in 2008, which started with courses on sustainability (including 8 hours course on lighting), with green building contest and ending with a European web-platform Construction21.eu. A major breakthrough was a 2012 Cluj-Napoca city council decision that a certified green building should receive a 50% local tax reduction.
Since then all new buildings are LEED or BREEAM certified and lighting was one of the parts were buildings received a lot of points or credits. The sustainable lighting approach is the future oriented solution. It includes all the aspects not
only technical or energy efficient ones and for this we need to rethink lighting from a broader perspective. |
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Technical University of Cluj-Napoca, Romania; beu(at)mail.utcluj.ro |
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Romanian Journal of Building Services |
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English |
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2393-5154 |
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no |
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Call Number |
IDA @ john @ |
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1393 |
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Author |
Bhukya, K. A., Ramasubbareddy, S., Govinda, K., & Srinivas, T. A. S. |
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Title |
Adaptive Mechanism for Smart Street Lighting System |
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Journal Article |
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Year |
2019 |
Publication |
Smart Intelligent Computing and Applications |
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160 |
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69-76 |
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Keywords |
Lighting |
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The adaptive street light has the ability to adapt to the motion of cycles, cars and pedestrians. It uses motion as well as light sensors to detect the traffic and light around. It dims when there is no movement on the road, and is brightened when there is any activity. Smart street lights are very dissimilar from the old methods of lighting. It is an automated system that will be able to automate the streets. The main objective of these lights is to decrease the utilization of power, while no activity is detected on the street. It will be switched ON while there are pedestrians and cars on the street or else they will get dimmed to 20% of the brightness. The proposed approach gives a method to conserve power by using the PIR sensors to sense the incoming traffic and hence turning ON a cluster of lights surrounding the traffic. As the traffic is passing by, the street lights left behind will dim on its own. Hence, a lot of power can be conserved. Also, during the day time when there is no need of light the LDR sensor will sense the light and the light will remain switched OFF. This smart street light system comes under the domain of smart city. |
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IDA @ intern @ |
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2723 |
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