[AZ-Observing] Re: Bylas, AZ lighting along US 70
- From: rick.rotramel@xxxxxxxxxxxxx
- To: az-observing@xxxxxxxxxxxxx
- Date: Fri, 15 Nov 2002 09:47:23 -0700
I drove through the area at night a while back after a SAC tour at Mt.
Graham. The highway was "well" lit up with the low pressure sodium
(yellowish). I don't know the effect on viewing the stars because I didn't
stop to look up, but I would say that the lighting was flooding the whole
highway with yellow light. Yes, they are full-cutoff fixtures, but putting
enough light downward creating a full lit up area, like they do at stadiums,
would generally have a big effect on the star viewing in the immediate area.
A few miles away I don't think one would be bothered if they didn't look in
the direction of the highway while looking at the stars.
But, I would say: What a perfect example of "overkill lighting". Generally
the low pressure lighting on streets every 200' is excellent, with no glare,
but it has that yellowish light that some people think is not bright enough
for security, even though they are actually better for security because of
the non-glare and non-hot spot effects.
My two cents worth,
Rick,
SAC
> -----Original Message-----
> From: Kerry Weatherford [SMTP:ancient_light@xxxxxxxxxxxxx]
> Sent: Thursday, November 14, 2002 10:48 PM
> To: AZ-Observing
> Subject: [AZ-Observing] Bylas, AZ lighting along US 70
>
>
> A couple weeks ago I sent a message to Frank Kraljic, who then forwarded
> it to Tom Polakis. The message was regarding the lighting through the
> small reservation town of Bylas, AZ along US Highway 70.
>
> The fixtures appear to be full-cutoff, however since I didn't pass
> through at night, I don't know if the lights are high-pressure or
> low-pressure Sodium lights, or something else altogether. It would be
> interesting to find out what kind of effect this has on the sky since
> the density of the lamps is so ridiculously high. I would think there
> would still be much more than normal surface reflection, even despite
> the asphalt & surrounding dirt areas. If anyone has any other ideas
> about the effects of this on visual magnitude in the area I'd be very
> interested to hear. Just thought since this has come up a couple times
> on this group I would post as much as I was able to find on the subject.
>
> -Kerry Weatherford
>
>
>
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