Re: LED's on Long disance lines

["Wally Mould" <wjmould@bigpond.com>]

"pdwyer" <pdwyerNOpdSPAM@ecn.net.au.invalid> wrote in message
29d235b0.59bf3227@usw-ex0104-026.remarq.com">news:29d235b0.59bf3227@usw-ex0104-026.remarq.com...
> "HXP1" <hxp1@dingoblue.gunzel.net.au> wrote:
> >MattyQ <mattyq1009@dingoblue.net.au> wrote in message
> >39950598$0$786$7f31c96c@news01.syd.optusnet.com.au">news:39950598$0$786$7f31c96c@news01.syd.optusnet.com.au...
> >> HXP1 <hxp1@dingoblue.gunzel.net.au> wrote in message
> >> news:398fc70c$0$774$7f31c96c@news01.syd.optusnet.com.au...
> >> > Jonathan Lau <jonlau@ozemail.com.au> wrote in message
> >> > > What is the life span of LED's?
> >
> >> > Quite a while.  Allegedly.
> >
> >> QR Signal Electricians have had experimental LED level
> >> crossing lights flashing outside their workshop at Mayne
> >> for just on 2 years now. That's right, 2 years continuous
> >> without being switched off (and they are still on to this
> >> day). In that time, a total of 9 LED's have failed. There
> >> are four lenses, three are LED the other is a globe. That
> >> works out to 3 LED's blown per lens in 2 years. Considering
> >> there would be about 3 or 4 hundred LED's per lens, that's
> >> a pretty good failure rate.
> >
> >Hmmm, I make that 350,000 hrs of flashing life per LED.
>
> We're banking on ten years per aspect. We've begun counting, so
> we'll let them know in the next fifteen years or so. The units
> we're putting in seem to be acclaimed by almost everyone.
>
> >If we throw a dart at the dartboard and say each train move
> takes an average
> >of 60 seconds, that's 21 Million train moves.
> >
> >Nice.  Any idea whose LED's there are?  Safetran, Harmon, or
> whoever else
> >makes them?
>
> I think the originals were Safetran, but I'm not sure. I'm off
> for three weeks so I can't run down & check :) We have changed
> type though. The original model was virtually nothing more than
> a cover over the LED's. The newer ones (running for two years by
> now I think) have that focussing plate as used in the Running
> signal aspects.
>
> What I would like are the super columates shunt lens's .. I had
> one demonstrated for me at five metres at the product show at
> the Crest. A Definite improvement on the standard 40W we use.
>
> >> Funny thing is, because they are level crossing signals,
> >> they have to be signed off by both QR and QT. I believe QR
> >> have signed off but still waiting for QT to make a
> >> decision.
> >> TYPICAL!!!
> >
> ><grins> I think we're lucky Vicroads just gives us the money...
>
> I think we also have a problem with the drivers, not having the
> side viewing ports, making it harder for them to see if the
> crossing is active. I notive our BCC is trialling LED's at Roma
> St, outside the bus terminal entrance, so maybe we're going to
> see the DOT permit LED's.
>
> Seeya!
>
>
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[0T]  Was in Singapore recently, and noticed a lot of their traffic lights,
(Signals) were LED. have also heard there are some in Hawthorn (MEL), not
sure where exactly.