SLMD121H04 Datasheet, PDF (6/6 Pages) IXYS Corporation – IXOLAR High Efficiency SolarMD

Relative Lighting Power Density
The figure above compares relative power density for various lighting conditions in units of Watts
2
per square meter (W/m ). The reference standard condition is 1 Sun and is equal to 1000 Watts
per square meter of sunlight irradiance at a constant 25°C cell temperature and at 1.5 Air Mass
(Air Mass stands for a well defined light spectrum which appears if the sunlight goes through the
earth’s athmosphere at a defined angle).
As the chart clearly shows, the power density of typical indoor lighting is dramatically lower than
that of sunlight. Not only is irradiance from indirect and artificial light lower; the spectrum is also
narrower.
In typical Office Space lighting with a spectrum produced from incandescent or halogen light
bulbs, the power output may be roughly 100 times less than bright sunlight. It may be 200 to 500
times less with fluorescent lighting due to the further limited spectrum.
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any express or implied warranty relating to its products, including, but not limited to, the implied warranty of merchantability, fitness for a particular
purpose, or infringement of any intellectual property right.
The products described in this document are not designed, intended, authorized, or warranted for use as components in systems intended for
surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of IXYS’ product may result in direct
physical harm, injury, or death to a person or severe property or environmental damage. IXYS reserves the right to discontinue or make changes to
its products at any time without notice.
IXYS reserves the right to change limits, test conditions and dimensions
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Rev. Jan. 2011
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