CRI of PL-AQ

["Richard J. Sexton" <richard at aquaria_net>]

At 03:48 PM 7/5/98 -0400, you wrote:
>
>Aquatic Plants Digest       Sunday, July 5 1998       Volume 03 : Number 365
>
>
>
>In this issue:
>
>	Re: Light Bulb
>	windelov and java fern Q ...
>	Re: red light
>	Re: buffering for CO2
>	Brown Leaves
>	flubenizonel
>
>See the end of the digest for information on unsubscribing from the
>Aquatic Plants mailing list and on how to retrieve back issues.
>
>----------------------------------------------------------------------
>
>Date: Sun, 5 Jul 1998 04:26:08 -0400 (EDT)
>From: ac554 at freenet_carleton.ca (David Whittaker)
>Subject: Re: Light Bulb
>
>Adam asked....
>
>>I wass curious if any one knew of the plant and aquarium bulb by GE ?
>>The bulb it's self says "Plant&Aquarium F15T8-PL/AQ" Does any one have
>>any idea s to the kelvin rating and/or the CRI of this bulb?
>
>It's 3200.

And the CRI is something like 65. CRI is fairly meaningless,
it just indicates how "natural" compared to sunlight the
output spectra is. Whats more significant is the graph
of the output spectra itself. PL-AQ has a nice big
spike in the red and blue. By themseleves, they're just
a bit too dim; I always use them as red suppliments with something
like a daylight bulb (or better).

I used to use GE Chroma 75, they're good but not cheap. GE
has recently labeled the old SPX65 tube as "Super daylight"
and they're extremely cheap - like $4 ea in Canada (where
you can typically double US prices for things.)


--
Richard J. Sexton
richard at aquaria_net
Bannockburn, Ontario, Canada                       +1 (613) 473 1719

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