Joel, no vis ( flat particles in suspension ) is no vis, but the rest of
the low vis stuff does work better with HID. I was not reading all the
posts. It is interseting that these things will penetrate the dark water
a lot further. 

Joel Markwell wrote:
> 
> on 5/8/00 5:17 PM, Trey at trey@ne*.co* wrote:
> 
> > Joel, these things just have a higher frequency, shorter wavelenth so
> > they penetrate further through water, as could be expected from any
> > light at that end of the spectrum.  The result is that you can "see"
> > further in its beam, and the particulate does not backscatter so badly
> > as with lower frequencies and longer wavelengths.
> >
> > As Dr Rose and the Trout suggest, this is why we use them in Leon Sinks
> > and Weenikulla.
> >
> > HID is basicly ultra violet.
> 
> Trey,
> 
> And as I was asking Trout et al, the point is not that they will allow one
> to see in zero-vis conditions, as has been suggested, but that they improve
> vis in low-vis conditions beyond that of a normal lighting system. Would
> that be accurate?
> 
> Later,
> 
> JoeL

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