The Lightmeter-Network

Recently developed light meters continuously measure the night sky brightness at many locations around the globe to monitor changes and provide an unbiased reference for the unaided eye measurements within constellations. Adopt a light meter and record the brightness of the night sky in your city, at your school or at your observatory. You need: (1) a computer with USB and Windows XP/NT/2000, (2) a place with a good view of the sky within 20 meters of the computer, and (3) about 100 Euros for the light meter. To get a Lightmeter download the Lightmeter request forms, fill in the data and mail it to For more information, visit