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Re: [APD] LIghting
Important to note the diff between "heat" and
"temperature". A lit match doesn't give off much heat (it
wont boil a cup of water) but the temp at the match head is
hundreds of degrees.
With PCs vs MHs, for about the same amount of light you're
going to have about the same amount of watts. MHs are
sometimes slightly more electrically efficient, but only a
smidge. Two lights (PCs and MHs) that are 150 watts are
going to generate the same amount of heat. In fact, since
halides are bit more efficient, they generate less total
heat. But they are at a higher temperature at the bulb.
The heat is coming from a smaller volume of space so the
heat causes a higher temperature in the smaller bulb. But
the overall heat isn't greater.
So make your choice between MHs and PCs based on
appearance, coverage, glare, and purchase and operating
--- Shane Kaiser <shanek at sbcglobal_net> wrote:
> I have a 110 gallon acrylic tank that I am setting up. It
> is 60" Long x 20"
> Wide x 24" Tall. What is the best lighting for a tank
> like this? The tank
> will be a planted discus tank. I am torn between power
> compact and metal
> halide. I am somewhat concerned about the heat metal
> halides give off. I am
> going to be using a custom canopy so they would be
> mounted inside it (the
> canopy can be 12" high). Do I need to go metal halide
> being I have a 24"
> tank depth? Is there a big difference between light given
> off by a power
> compact versus metal halide? Any suggestion/opinions?
> Thanks Much,
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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