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Latest Light pollution Stories

Exposure To 'White' Light Suppresses Melatonin
2011-09-12 09:39:25

  Exposure to the light of white LED bulbs, it turns out, suppresses melatonin 5 times more than exposure to the light of High Pressure Sodium bulbs that give off an orange-yellow light. "Just as there are regulations and standards for 'classic' pollutants, there should also be regulations and rules for the pollution stemming from artificial light at night," says Prof. Abraham Haim of the University of Haifa. "White" light bulbs that emit light at shorter wavelengths are greater...

2011-08-06 00:00:30

LED Lighting manufacturer Evluma announces plans to expand its product line beyond the popular 40W & 50W outdoor dusk-till-dawn Clearlight and intends to enter the indoor lighting market with a dimmable LED PAR 64 ceiling light designed for use in ballrooms and conference centers. Prototypes of the PAR 64 LED lamp, plus a Clearlight horticultural lamp, a low pressure sodium equivalent lamp, and an acorn fixture LED Retrofit with multiple mounting options were demonstrated at The LED Show...

2011-07-26 06:00:00

BURLINGTON, Mass., July 26, 2011 /PRNewswire/ -- Residents of Boston will be seeing the city in a whole new, brighter light thanks to new light-emitting diode (LED) street lighting from Philips. Improving the city's energy use and environmental footprint, more than 14,000 mercury-vapor street and roadway luminaires are being replaced in Boston neighborhoods by Philips Hadco's New RX1 and RX2. The LED's - which maximize energy savings and provide uniform, comfortable and...

2011-07-11 08:00:00

SATELLITE BEACH, Fla., July 11, 2011 /PRNewswire/ -- Lighting Science Group Corporation (OTC: LSCG) Chairman and Chief Executive Officer Jim Haworth issued the following statement regarding the movement to pass the Better Use of Light Bulbs Act, H.R. 2417: "Energy efficiency is the most powerful and cost-effective tool for achieving a sustainable future. Improvements in energy efficiency can reduce the need for investment in energy infrastructure, cut fuel costs, increase competitiveness,...


Latest Light pollution Reference Libraries

7_680ea780e47f127f8391cefcc37578012
2004-10-19 04:45:43

Light Pollution -- Light pollution refers to excess light, created by human activities, that brightens the night sky enough to hide many stars from observers. For the average person, light pollution means that even on a clear, moonless night, only a few stars may be visible. When a city grows up near an astronomical observatory, light pollution can make the observatory effectively useless. Unlike most forms of pollution, light pollution isn't persistent: turn the lights off, and the...

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Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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