Aus Starlight and Lightmeter Wiki
How many stars can we still see? - The starlight wiki
Lighmeter (at the top of the mast) in the Dürrenstein Wilderness area, Eastern Alps, Austria, in March 2012 after taking a unique data set during the strong and snow rich winter to help the IAU's initiative on astronomy and world heritage.
Lightmeter on the 30m tower at the ESO-ELT 42m telescope site , Jan 2011
Lightmeter at Cerro Armazones, just before installation, Jan 2011
First light for the Lightmeter at the Teide Observatory. Image: Hans Deeg
Jan 2010: Day- and nightime 100s-variations at Paranal demonstrate the Sun-recording capabilities of the Lightmeter under the unique Atacama skies.
June 2009 night brightness, measured in Berlin, Linz, Tautenburg and Vienna.
Simultaneous measurements of night brightness near the 2009 summer-solstice.
First Berlin-measurements Feb to early March 2009. Horizontal line: value for full moon in zenith
40 days of measurements at Tautenburg; non-stop from 26th Sept. to 7th Nov. 2008.
Lightmeter: A network of newly-developed, low-cost lightmeters starts the global continuous monitoring of artificial night sky
brightening (light pollution). Jan. 2013: >300 Lightmeters. more
Jan. 12th 2013: First results from the new SETAGAYA (Tokyo) station as presented at a star party on 11 Jan. at the Setagaya Planetarium. From June to December 2012 the light at night 8 km from the centre of Tokyo scatters around the maximum full-moon values but some hours during the year are 15 times darker than the full moon - still about 10 times above natural light at night. --GuentherWuchterl 17:03, 14. Jan. 2013 (UTC)
Sep. 20th 2012:, 8 UTC first light for the southernmost Lightmeter (47° S) at Mt. John Observatory, Lake Tekapo in the Lake Tekapo - Aoraki - Mount Cook Starlight Reserve, New Zealand, http://starlightreserve.org (IDA gold http://www.darksky.org/page/IDSReserves ).
Apr. 27th 2012:, Light over Vienna - a study of the energy content of Vienna's light-dome and the top light emitters (in german): Download pdf from WUA at the Vienna enviromental protection agency WUA, http://wua-wien.at/
How many stars can we still see?:
Simple naked eye sightings of the Little Dipper or Orion
serve to determine the quality of the world's night skies. more
PV light measurement at twilight and night, Brno Observatory