Re: LED's on Long disance lines

["HXP1" <hxp1@dingoblue.gunzel.net.au>]

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.

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?

> 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...

--
HXP1
(now with v6.08 software)