[TCUG] Re: LED Signal Heads
- From: "Matthew Smith" <MASmith@xxxxxxxxxxxx>
- To: <tcug@xxxxxxxxxxxxx>
- Date: Fri, 5 Aug 2005 11:07:28 +0100
The new Germanic single light source products are currently being offered a=
t the same price as the existing LEDs, although a "single source" tells me =
that they are expecting prices to fall as production and customer take up i=
ncreases.
The situation was likened to buying a large plasma TV last year and buying =
the same product in two years time.
Matt
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx]On
Behalf Of Peter Jones
Sent: 05 August 2005 11:00
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Re: LED Signal Heads
Chris,
I trialled LED heads (though not Peek, to be fair) at a junction in Sefto=3D
n but was disappointed at the failure rate; three in one year. As the fau=3D
lt could only be cured by replacing the driver equipment which is not che=3D
ap and so, puts the maintenance cost way above that for normal lamps. I =3D
am questioning the current state of this technology.=3D20
I monitored energy at the LED site and an identical site elsewhere (both =3D
have T200 controllers, an OTU and 8 heads with no dimming) by fitting ele=3D
ctricity meters. In the 19 months from March 2003, the LED site used 218=3D
1kw, whereas the non-LED site used 2591, a difference of around 16%. Howe=3D
ver, bearing in mind the initial cost and the three repairs, the costs fa=3D
r out way any possibility of savings.
On a brighter note, I understand that a new 'single source' LED head is b=3D
eing developed in the BLUE corner (hope I got that right - adjacent to th=3D
e deep blue sea... or pool!), which promises to be much cheaper to buy an=3D
d more reliable and I intend to try these as soon as possible. I've not y=3D
et heard of any long term successful trials with first generation LED hea=3D
ds.
Regards
Peter
Peter Jones
Principal Traffic Systems Engineer
Phone: +44 (0) 151 934 4254
Fax: +44 (0) 151 922 4514
Mobile: 07788 100 584
Peter.Jones (AT) technical.sefton.gov.uk
Sefton MBC - UTC
7th Floor
Balliol House
Balliol Road
Bootle
L20 3NJ
Please see our web pages on traffic control in Sefton:
http://www.sefton.gov.uk/content-2781
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