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Re: Anyone moved to LED Lighting?



Incandescents were not so acceptable. They were experiemtning with LEDS to
lower the maintenance on incandescent systems.

Somebody ehre was roght about the lack of heat too. Snow storms can fill the
lamp projector lens in and the status cannot be told during the day. (No we
aren't moving to Florida, Robert...LOL)

After a debate on the job, we ran into a traffic light maintenance crew and
pulled over to chat with them.
IIRC, they informed me they replace the incandescents every year or on
report. We always have multiple lamps for out traffic lights. I assume you
are in the USA where they classically may have only one traffic head facing
each way. We have at least two and on big intersection, three or four,
sometimes. (we get lower sun in the winter. There always seems to be the
main one with a sunset right beside it)

I would imagine an incandescent, pushed and heated that hard and then
blinked on and off would wear the filiament out (thermal shock) very
quickly, too.


"Don Klipstein" <don@xxxxxxxxxxxxxx> wrote in message
news:slrnhglsi3.s0t.don@xxxxxxxxxxxxxxxxx
>  I meant being kept in service for 5-10 years.  Most of Philadelphia's
> red ones installed in the 1990's and using an LED chemistry since
> superseded in traffic signal use are still working and in service, not
> relaced just for a few LEDs being out.
>
>  Now that they are making them with power consumption as low as 7 watts
> for ones 8 inches in diameter and 8 watts for the ones 12 inches in
> diameter, heat is not that big a deal in traffic signals that had
> incandescents of 92 or 116 watts.  Such huge reduction in power
> consumption occurs in part from not having 70-75% of the light blocked
> by red and green filters.
>
>  If any failure is so intolerable, then why were incandescents
> acceptable?
>
> - Don Klipstein (don@xxxxxxxxx)
>




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