Re: [APML]: Active Light Pollution Reduction

["Patrick W. Greenlee" <patrickg@nosc.mil>]

>
>Where is the sensor physically located on a typical modern streetlight?
>- Kal Krishnan
>(krishnan@flatconnect.com)

How high is up.  How long is a string?

With street lights, they frequently are located in a small appurtenance
atop the light/ballast assembly.  It is unlikely that the photocontroller
would be mounted where tha controlled light would shine on the control
unit.  Some installations have remote sensors.  In my neighborhood we have
vertical street lights on pedestals in the middle of the intersections
(stops a few drunk drivers, especially in a power outage at night).  These
lights are low pressure sodium and entire banks of them up come on
synchronously and at a certain light level not a given time so I suspect
each bank has a photocontroller but I don't know where the clever buggers
hid it.

Patrick