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A summary thread on lighting Do orchids need UV light?
 
 
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Old 09-16-2012, 08:54 PM
DavidCampen DavidCampen is offline
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Join Date: Nov 2010
Location: Southern California, Los Angeles
Posts: 965
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I see that some people believe that UV helps algae to grow.
See page 6 here:
http://www.atlantalightbulbs.com/lib...rium-Lamps.pdf
"Daylight Star" fluorescent lamp with "UV Stop" -
"Reduces algae growth through a special UV-STOP protective sleeve"

They show that it cuts off light below 400 nm.
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