Re: [GSAS-Member] Speaking of lights... anyone using T5 HO fixtures?

["Hostetter, Kypros" <hostetter2003@lawnet.ucla.edu>]

Matt, I have heard really good things about Catalina, although I have been
very happy with my AH Supply CFL setups, I am going to try Catalina t5 for
my next tank. Tek T5 ights are also very popular.

On Mon, Dec 21, 2009 at 11:55 AM, Matt Staroscik <matt@wrongcrowd.com>wrote:

> My current setup spills a lot of light out the front glass, so a T5HO
> fixture with individual reflectors per bulb should be a lot more efficient
> in that regard.
>
> (I see your " marks as curly quotes which is probably the root of your
> problem.)
>
> On Mon, Dec 21, 2009 at 11:42 AM, Seattle_Aquarist <
> Seattle_Aquarist@comcast.net> wrote:
>
> > Hey Matt,
> >
> > In my experience with an unusually deep aquarium, say 22” or more, I need
> > to
> > pay as much attention to the reflector portion of the lighting system as
> > the
> > wattage.  (My Physics teacher would be glad to know that I occasionally
> use
> > the “Inverse Square Rule” for light intensity; 2X the distance from the
> > bulb
> > and get ¼ the light intensity.)  For example, I have a 45 gallon tall
> (24”
> > deep) and a 30 gallon long (16” deep); both tanks are 36” long.  To get
> the
> > same light intensity to the bottom of my 45 gallon tank that I have in 30
> > gallon aquarium I need 225% more output!  I don’t run that much light in
> my
> > 45 gallon, but I can’t grow the same low growing plants in it that I can
> > grow in my 30 gallon.
> >
> > In a deeper aquarium the shape of the reflector and material it is made
> of
> > has a lot to do how much light intensity actually gets down to the
> > substrate
> > level of the aquarium.  Some reflectors reflect light more light outwards
> > and less downwards while other direct more light downwards and less
> toward
> > the sides.  In a deeper aquarium, if I get a reflector that directs more
> of
> > its’ light outwards then I can grow a lot of algae on the side of my tank
> > but not a lot of low growing plants at the substrate level.    BTW, I run
> > 6700K lights and they give me good color rendition as well as plant
> growth.
> >
> > Roy
> >
> >
> >
> >
> >
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