In article ,
Dr Engelbert Buxbaum wrote:
Feral Boy wrote:

Hi, could someone please tell me which will be the best Hagen light tube
will be best for showing the colours of my fish?

For showing colours a natural white bulb (5000 to 6000 Kelvin) would be
best. However there are other things to consider.

Do you have a fresh- or seawater tank? If seawater, your reef critters
need a lot of blue and ultraviolet light to stay healthy, and some of
them show a very pretty fluorescence. There are special "actinic" bulbs
for that, with light colour of 10,000 Kelvin and more.

If freshwater do you have plants? Plants require red and blue light for
photosynthesis, but standard tubes give little red. Thus your plants
would do better with a "tropical" broad-spectrum tube. There are also
"grow"-lights, which have only blue and red, no green. For a plant only
tank that might be acceptable, as plants use little green light anyway.
However, under that sort of light the colours of fishes would look very
unnatural.

If you don't have plants, a cheap standard white tube from the
supermarket would serve you just as well as the more expensive ones from
your LFS.

No offense intende but this article above represents state of the art
1980's thinking. I've proved to myself that warm white work evry bit
as good. You can easily do the same if you try.

If you want to go crasy you could add a cool white or daylight
as well, which is, by golly, what people used to use before all those
short lived designer pink petshop tubes came out.

--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net