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Re: Dutch aquarium lighting



Lennart =?iso-8859-1?Q?Ed=E9n?= <le.e at privat_utfors.se> wrote:

> 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

Indeed, Lennart, I double checked the Aquarelle PDF page at high magnification
and saw the "89" in there. I'm having problems in reading some PDF files 
from the Philips European web catalog. Thanks for the info.

This weakens a little bit my argument: now 7 out of the 15 listed tanks use 
some sort of blue light bulb. Still, it is typically one bulb in a set of 4 
or more, all the others being very yellow. 

Here is the revised table:


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
89  -  Aquarelle 10,000K, CRI 70
92  -  Perhaps a 2,750 Kelvin, CRI > 90 ? Couldn't find it in Philips cat.
930 -  3,000 Kelvin, CRI > 90
940 -  4,000 Kelvin, CRI > 90 


- Ivo Busko
  Baltimore, MD