[RFI] LED streetlights - Lumenistics

[Ken Winterling]

I remember years ago when municipalities replaced incandescent traffic
lights with LED lights to save money.  They discovered that in winter the
snow would cover and block the lights since they didn’t generate heat like
their predecessors.

The solution was to add heaters which, of course, reduced the cost savings.
This is similar to replacing incandescent bulbs in older cars with LEDs and
needing load resistors for the emergency and directional signals because
the old flashers required a minimal load current to operate.

Ken
WA2LBI


On Wed, Mar 4, 2020 at 13:19 David Robbins <k1ttt.dave at gmail.com> wrote:

> No, and there are advertisements that show that led lamps still melt snow!
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt at arrl.net
> web: http://wiki.k1ttt.net
> AR-Cluster node: telnet://k1ttt.net:7373
>
>
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces+k1ttt=arrl.net at contesting.com] On Behalf Of
> w2ay at atmc.net
> Sent: Wednesday, March 04, 2020 18:00
> To: 'Dale Johnson'; 'Alan Higbie'
> Cc: 'Rfi List'
> Subject: Re: [RFI] LED streetlights - Lumenistics
>
>   Is  there a problem with  snow  build-up on  the new  LED  lights. ?
>    I  ask  because , I  assume  there  is  no heat  to  melt  any  build
> up of  snow. .  Before  the change to  LED lights, did  snow  block  the
> lights ?
>                                                          Bill / w2ay
>
>
>  ***************************************************************************
>
> The entire city of Bloomington, Minnesota has LED street lights.  There is
> one less than a half block from my house.  The Mall of America is six miles
> East of me and the entire parking ramp is LED lighted.
>
> I was also concerned when they started the project.  So far I have not
> noticed any increase of noise from these lights.  They’ve been in place now
> for a few years.  They save on electric power and the old street lights
> used to be a problem when the automatic switches failed, those were
> operated by light sensors on top of the old street lights.  I think there
> is a similar setup with the LED lights, but so far have not failed..
>
> Good luck
>
> Dale, K9VUJ
>
>
>
> On 03, Mar 2020, at 12:41, Alan Higbie <alan.higbie at gmail.com> wrote:
>
> Our city (Colorado Springs) is installing LED street lights with some new
> type of controllers.
>
> I am not sure, but I believe these are made by a company named Lumenistic
> (of Boulder, Colorado).
>
> Here is link to recent news article:
>
> https://gazette.com/news/local/colorado-springs-tests-remote-controlled-smart-streetlights/article_d8fb4748-5ccb-11ea-8e2f-db73a4aa2d5e.html
>
>
> It is the microprocessors with potential for RFI that I want to know about.
>
> I'll probably take my Tecsun PL 660 over to where they have installed some
> of the new lights and take a listen.
>
> Anyone have experiences along these lines?
>
> 73, Alan K0AV
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-- 

Ken
WA2LBI

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