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Any exterior light source that permits light to go upwards or where it is not needed:

  • Unnecessary - Lights that have no useful purpose or are lit when not needed.
  • Excessive - Lights that are too numerous or simply too bright.
  • Badly designed - Lights that are not properly shielded or have no shielding at all.
  • Badly installed - Lights that are poorly directed or situated.

Older street lights are a major cause of urban skyglow. In some instances, lighting schemes for streets, precincts and commercial premises are simply 'over the top' and indiscriminate to no overall gain and are simply wasteful. Illuminated signs and buildings contribute further as does uncontrolled and badly designed and installed domestic lighting.

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16y ago

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