[Coral-List] Photosynthetically Active Radiation

[hervÿffffe9 Rousseau]

Hello,
You can take a look at this article :
http://www.advancedaquarist.com/2005/12/aafeature2
"The PAR (Photosynthetic Available Radiation, unit
µE/m2/s) measures the number of photons reaching a
surface, all this in the wavelengths of the visible
light (between 400 and 700nm)" And the "orginal"
article in french :
http://www.recifs.org/modules.php?name=News&file=article&sid=140&mode=&order=0&thold=0
Hervé


-----Message d'origine-----
De : coral-list-bounces at coral.aoml.noaa.gov
[mailto:coral-list-bounces at coral.aoml.noaa.gov] De la
part de Jade Maggs Envoyé : mardi 24 janvier 2006
10:58 À : Coral List Server Objet : [Coral-List]
Photosynthetically Active Radiation


Please can someone explain what P.A.R. is. I gather it
is a percentage of lux which is photosynthetically
active. For two bulbs with the same lumen output, can
P.A.R. differ.

Jade Maggs
Aquarist
uShaka Marine World
083 515 1079
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