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PostPosted: Thu Dec 10, 2015 9:17 pm 
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Derby City Council are looking at "investing to save" by replacing 49% (14,289) of their lanterns with LED. A final decision is imminent. This would not be the first time a council has chosen to fund LED upgrades to street lighting that has in recent years been subject to a PFI.


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PostPosted: Fri Dec 11, 2015 8:31 am 
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What a waste!


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PostPosted: Fri Dec 11, 2015 9:25 pm 
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I disagree - between 2007 and 2012 the majority of SOX installations in Derby were replaced with Cosmo Iridiums - they've served up to 8 years service in some cases now - I imagine they have a buy back deal with Balfour Beatty who can reuse them elsewhere, so it isn't a waste and in the process we get upgraded lanterns and reduced energy consumption with no impact on the street scene and lighting levels.

I imagine this is why the relatively recently installed nodes weren't installed on the 45/60W lanterns, which generally still run off photocells. New LED installations seem to have the nodes installed according to Mike Barford's website's latest update (http://www.streetlightonline.co.uk/LocalLights/Sideentry/localluma1s.htm), so imagine this will become the norm when the Iridiums are replaced with LED lanterns (probably Lumas) and further reduce energy consumption justifying the invest to save measure.

Probably quite a smart move really.


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PostPosted: Sat Dec 12, 2015 7:55 am 
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Buy back? When everybody is installing LED now..

And what is LED going to achieve on savings by the time you've factored in lantern costs,  installation, CO2 etc when most of their stock is 45 & 60w Cosmo. Seems a waste to me. Why not wait a few more years.. Realise LED is not what they say it is and think to yourself how lucky they have reliable Iridiums  :lol:


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PostPosted: Sat Dec 12, 2015 5:15 pm 
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I agree. I highly doubt Philips would want to buy back lanterns which would be out of warranty, which they would also have to carry out electrical testing on before passing them on. Balfour Beatty would also struggle to get agreement from any other council to use them elsewhere. Also consider that CosmoPolis is a relatively expensive lamp and gear system to opt for, and the sort of council that would buy in second hand lanterns (and I'm speaking about home and abroad here) is probably too cheapskate to use a lamp and gear system so extravagant, preferring SON because SON lamps are cheap. Reuse of lanterns is a sensible idea, but in the world we live in it is not the sort of thing that companies or councils want to do.


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PostPosted: Sat Dec 12, 2015 7:04 pm 
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LED has made all other forms of discharge lighting obsolete. Despite how we may all feel all traditional lanterns that get replaced now are as good as scrap, even if they're fairly new.

Its seems as if the advent of LED surprised a few Local Authorities. The energy saving of LED means they feel they have to abandon their original plans, even if it is in essence, wasting perfectly good lanterns.


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PostPosted: Sat Dec 12, 2015 7:34 pm 
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Local authorities bought the sales pitch from the manufacturers.

Let's take Cornwall for example. A few years ago, they embarked on an "invest to save" street lighting replacement scheme. All lanterns would be replaced or upgraded to CosmoPolis linked to a central management system enabling remote dimming and switching. At the time Cornwall was leading the way. CosmoPolis was one of the most advanced lighting systems available, offering maintenance cycles as good as high pressure sodium whilst reducing power consumption and offering white light in comparison. Cornwall toned down the brightness of lighting through the use of white light, which was permitted by British Standards, using 45W in place of 70W and 140W in place of 250W. The mass roll out of a central management system was also something only a few other authorities had trialled in a half-hearted manner.

At the time, LED was on the market, but the technology was very immature. LED technology was unproven and lanterns were typically just as high wattage as the HID lanterns they replaced. Fast forward to today though, and if Cornwall were to look at an "invest to save", it would not be 45W Cosmo but probably something like 24W LED, and it would not be 140W Cosmo but 100W LED. Unfortunately, they replaced everything, which made their lighting some of the most energy efficient at the time, but times have changed and they are stuck with HID technology until they have recouped their costs.


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PostPosted: Sun Dec 13, 2015 5:34 pm 
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SilverRay88 wrote:
Its seems as if the advent of LED surprised a few Local Authorities. The energy saving of LED means they feel they have to abandon their original plans, even if it is in essence, wasting perfectly good lanterns.


It's the cost of electricity and especially the cost the councils are charged for CO2 emissions that is why they are keen to save as much as possible. Neither of these issues were foreseen/existed when many PFIs were in the planning stages a decade ago.


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PostPosted: Fri Jan 08, 2016 10:06 pm 
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Been out of the loop for a while but there are a good few of these at Hilton Business Park near Derby. Many are out but some still work. The whole area seems good for SOX however.

I thought these were GEC Z9464 but the bowls don't look pointy enough. ID would be welcome please.

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Thanks,
Chris


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PostPosted: Sat Jan 09, 2016 7:32 am 
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Those appear to be GEC Z9450s


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