Re: NANFA-- light bulbs and tannins
Thu, 18 Jan 2001 22:24:07 EST

In a message dated 1/18/01 9:10:36 PM Eastern Standard Time, writes:

<< Bruce,

All major manufacturers have spectral data available for their bulbs,
although this is usually not available on their website. You will
have to contact a willing individual in the company to obtain this
data. The "sunlight" bulbs have a high CRI, which is one clue to
suitability, and are similar to the "vitalite" in spectral characteristics.

a complete spectrum doesn't always go hand in hand with CR index. A high CR
can be obtained with an incomplete spectrum. CR refer to the way the human
eyes sees the light. matching the spectrum with the sun will give a you a
good CR but adding more blue light will give you a higher CR. freshwater
plants use red light more than blue. Marine algae use more blue than red.


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