Re: Aquatic Plants Digest V4 #712

[Lennart Edén <le.e at privat_utfors.se>]

Hi Ivo,

The "89" type is probably the Philips īTL`D/89 Aquarelle 10000K that is
widely used in Europe. I use them myself and really like them. They
somewhat compensate for the strong peat tint I have in my tanks. The
10000K rating is a bit confusing since they donīt look that blue to me.
Colour rendition is excellent even though the CRI is only 89.

Lennart 
Norrkoping Sweden


Ivo Busko wrote:
 
> ------------------------------
> 
> Date: Mon, 11 Dec 2000 08:30:08 -0500 (EST)
> From: busko at stsci_edu (Ivo Busko)
> Subject: Dutch aquarium lighting
> 
> I did a quick survey of the nbat Dutch web site to gather some technical
> data. I am curious about what techniques they use, and if, and how, they
> differ from "our" current lore. I had the impression, when first browsing
> thru the tank descriptions, that there was a high incidence of very low
> color temperature bulbs, at least according to "our" standards. The data
> below confirm this. Note that apart from the "daylight" and Aquarele, there
> is no reference to anything as "blue" as 5,000 Kelvin. Use of incandescent-like
> color temps (around 3,000 K) seems to be the norm instead. There is also
> no references to anything different from standard fluorescents, such as MH,
> PC or halogen (or I just couldn't find them...)
> 
> The Watts/gal values seem rather low but are consistent with the distribution
> posted by Erik Olson at the krib site, albeit at the lower end of the
> envelope. These are in general quite large tanks.
> 
> The table includes all planted tanks listed at the 1999 competition pages,
> and also the planted tanks listed at the archive page under "Vivarium in
> beeld". I didn't include a couple tanks for which I couldn't make sense of
> the light bulb designations (such as 77). I also didn't include a couple
> tanks with incomplete data.
> 
> - -Ivo Busko
>  Baltimore, MD
> 
> Volume  Watts/gal  Depth     Quantity of bulbs and color type
>  (gal)             (cm)
> 
>  100      2.87      50       5 X 29, 830, 840
>  112      2.57      50       3 X 830, 1 X 840, 1 X 89 (?)
>   92      2.50      45       2 X Warm white, 1 X Grolux, 1 X daylight
>  110      2.28      50       82, 830
>  106      2.18      47       1 X 92 (?), 1 X 930, 1 X 940, 1 X 840
>  152      1.90      60       2 X 830, 2 X 840, 1 X Aquarele
>  198      1.75      48       6 X 92 (?)
>  172      1.67      50       8 X 830
>  132      1.62      55       2 X 92 (?), 2 X 940
>   90      1.60      50       1 X 89 (?), 1 X 82, 1 x 830, 1 X 840
>  283      1.52      55       12 X 830, 840
>  124      1.45      60       4 X 830, 1 X 840
>  276      1.42      55       89 (?), 930, 940
>   86      1.26      50       2 x Warm white, 1 X Aquarele
>  146      1.23      50       3 x 830, 1 X 827, 1 X 89 (?)
> 
> Color designations:
> 
> 29  -  2,900 Kelvin, CRI 70 (halophosphor)
> 82  -  Perhaps a shorthand for 827 ?
> 827 -  2,750 Kelvin, CRI > 80
> 830 -  3,000 Kelvin, CRI > 80
> 840 -  4,000 Kelvin, CRI > 80
> 92  -  Perhaps a 2,750 Kelvin, CRI > 90 ?
> 930 -  3,000 Kelvin, CRI > 90
> 940 -  4,000 Kelvin, CRI > 90
> 
> The (?) means no correspondence exists within the Philips European catalog.
> 
> I couldn't figure out what the "89" type means, but there is a reference
> to a "Aqua Star" brand/type associated with that number.
> 
>

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