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These fixtures are considered ideal by many architects.
They can look fine in daylight. However, during night their light shines mostly
in your eyes and into space, with only a fraction of their light falling
on the ground.
People with eye disabilities may see nothing but the lamps. |
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Lighting fixtures with a pronounced, visible globe are still taken as a matter-of-course
by uninformed people. Even such fixtures cast too much light to the sky and
burden people by glare. At least one third of the radiating light serves nothing else
but pollution. |
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Just a fixture with a flat glass on the bottom directs the light
properly. Having a row of such lamps ahead, you can really see your way
and the sky can be full of stars even at the end of the city.
(Even an old fixture can become good by discarding the diffusing
bottom belly...) |
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Both fixtures casting most of their light downwards are shown without poles, as they can be mounted in many different ways. Plots and text by Jeník Hollan, N. Copernicus Observatory and Planetarium in Brno, January 2001. For the source programmes in PostScript (and bitmaps *.png made from them by "convert") see directory http://amper.ped.muni.cz/~jhollan/light/schemata.
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