Re: Best way to power array of LEDs?

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#239

From: daestrom
Date: Mon, 07 Oct 2002 21:32

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"James Sweet" <jamessweet@hotmail.com> wrote in message
news:W8ao9.64063$Pz.71865@rwcrnsc51.ops.asp.att.net...
> The traffic light LED's use a transformerless power supply usually so they
> flicker at 60 Hz, the yellow doesn't flicker because it's incandescent,
> they're on so little that the savings of using LED's for them would be
> minimal.
>

The yellow traffic lights here in NY are LED's.  You *can* see the
difference when you're up close at a stoplight (left-turn arrows etc..).

I believe the electricity savings is only a part of the switch over to
LED's.  Considering the cost of maintenance crews, and scheduling them to
come out and re-lamp all the lights in a stop light, I think the longer life
is the predominant savings.

daestrom

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From: "daestrom" <daestrom@twcny.rr.com>
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