Portable handheld artificial light detector
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United States of America Patent
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Apr 21, 2009
Grant Date -
N/A
app pub date -
Oct 18, 2007
filing date -
Oct 19, 2001
priority date (Note) -
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Abstract
A portable, handheld artificial light detector distinguishes artificial light from sunlight and identifies low-frequency artificial light from high-frequency artificial light. Artificial light includes light from a lamp powered by an AC source. Low frequency light includes, for example, light produced by a magnetic luminaire ballast, while high frequency light includes light produced by an electronic luminaire ballast.
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