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South Coast PFI
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Author:  bob32 [ Wed Aug 30, 2017 4:42 pm ]
Post subject:  Re: South Coast PFI

Has the South Coast PFI switched from using SON? I have noticed a significant number of white lighting on main roads in Gosport that were previously SON lit. In most cases there were patches of SON still being used. The same fixtures were being used.

Author:  Phosco152 [ Wed Aug 30, 2017 8:44 pm ]
Post subject:  Re: South Coast PFI

If the same fixtures are in use, then CDO-TT metal halide lamps would have had to replace SON, otherwise its a gear and lampholder change.

Given the former lamps are more expensive and don't last as long, I doubt it, probably a shortage of SON lamps is causing the swap.

Also given the amount of dimming used by the PFI, and metal halide lamps are less suitable to be dimmed, (although they may be inhibiting dimming on those lanterns if indeed they are CDO-TT), casts further doubt on a mass swap over to a new lamp type.

Small amounts of LED got used in the last stages of the PFI, and if white light was being rolled out further (again unlikely at this stage), I would expect it to be via LED.

Author:  sotonsteve [ Thu Aug 31, 2017 6:14 pm ]
Post subject:  Re: South Coast PFI

Agreed. I have seen a few instances of CDO-TT lamps being used where lighting is predominantly SON, but this isn't a new thing within the PFI. It is bizarre they do it, given that neither the Hampshire or Southampton elements of the South Coast PFI have any intentional non-CosmoPolis metal halide installations left. Perhaps they are using up lamps from the stores from back in the days when they had CDO-TT to maintain.

Author:  versalift09 [ Tue Apr 10, 2018 10:57 pm ]
Post subject:  Re: South Coast PFI

Portsmouth are going to be rolling out the installation of Mayflower CMS across the city which will be done in conjunction with the Colas LED replacement works. This followed a trial installation back in late 2017.

Author:  sotonsteve [ Mon Jun 11, 2018 4:25 pm ]
Post subject:  Re: South Coast PFI

Despite replacing its lighting stock with lower power lighting and also dimming the new lighting stock quite considerably, Hampshire County Council is looking to make further savings on street lighting by potentially introducing part night lighting. A consultation has just opened asking for people's opinions. Any changes would be implemented in April 2019.

Author:  sotonsteve [ Sun Aug 26, 2018 3:43 pm ]
Post subject:  Re: South Coast PFI

The GEC Z5580s and AC Ford AC730s at Southampton Sports Centre are no more. The existing cast iron columns and swan necks have been retained, but are now fitted with Metcraft Addington lanterns running PL-T lamps. Nice that the existing casties and swan necks do survive. The Thorn Gamma Basiques have all been replaced with Libras too.

That means that in Southampton and the surrounding area, to see casties with vintage lanterns you now have to almost exclusively look in places like people's front gardens. There are two exceptions to this in the city. One is Shamrock Quay, which has a sizeable number of ex-Southampton casties fitted with Coughtrie PW lanterns. The other is Bellemoor Tavern, which has three casties out the front, again fitted with Coughtrie PW lanterns.

Author:  sotonsteve [ Thu Sep 13, 2018 7:08 pm ]
Post subject:  Re: South Coast PFI

I wonder what the future holds for the type of lanterns installed on the South Coast PFI.

Eight years into the PFI, and two of the most commonly installed lanterns no longer appear to be manufactured; the Arc and the PL-L Libra. Of course, on new schemes such as road improvements and new housing developments the Luma is now installed pretty much as standard. There are exceptions, such as widening of the A27 near Titchfield where there was some reuse of Iridiums. The Iridium is still available. But what about elsewhere? I've seen an Arc replaced with a Libra a couple of years ago, and I've also seen an Arc replaced with an Iridium. Replacing an Arc with an Iridium is fine, as the light source is the same, but what about a Libra? If they run out of Libras, they won't be able to replace with the same light source.

Author:  Phosco152 [ Fri Sep 14, 2018 3:47 pm ]
Post subject:  Re: South Coast PFI

At Hook in Hampshire,  the bridge that takes the bypass under the London Waterloo - Basingstoke railway line retained its SOX "tunnel" lighting long after the end of the PFI. I had expected them to be removed entirely as has happened elsewhere. However sometime in the last year its been replaced with new lighting, and surprisingly it's not LED. It's PL-T tubes in similar fittings to the SOX ones and in the same places on the underpass.

Author:  GreatNorburyStDepot [ Fri Sep 14, 2018 6:52 pm ]
Post subject:  Re: South Coast PFI

Re: SOX "tunnel" lighting.

Although it is difficult to get the full detail from the GSV image, it looks like the original SOX fittings were installed into the integral recesses of the concrete bridge deck. For replacement purposes, you would be limited to a luminaire of the same dimensions and design, regardless of the lightsource employed.

That is not to say that a different lantern couldn't be used, however the cost of re-equipping the installation from scratch may have been prohibitive in this case.

Additionally, being a major part of the UK's railway infrastructure, would also mean involving Network Rail or whoever is responsible for the upkeep of the structure.

Author:  sotonsteve [ Wed Oct 31, 2018 6:52 pm ]
Post subject:  Re: South Coast PFI

Following a consultation, Hampshire County Council has decided to proceed with implementing part night lighting. Report Here. Residential areas will see lighting switched off between 1am and 4am, with the exception of where there are speed humps or pedestrian crossings. This is quite a short window of darkness compared with other part night schemes across the country (only 3 hours), but results in an 8.1% energy saving over existing. Part night lighting will commence from 1st April 2019.

Here are results to the first three questions of the consultation. The full results can be found here.

1. To what extent do you agree or disagree with the proposal to turn off street lights for a minimum of two hours a night, every night?
Strongly Agree - 37%
Agree - 29%
Neither Agree or Disagree - 3%
Disagree - 9%
Strongly Disagree - 21%
Not sure - 1%

2. For how many hours would you prefer street lights to be switched off during the night?
2 hours - 17%
3 hours - 23%
4 hours - 41%
5 hours - 2%
6 hours - 2%
7 hours - 0%
8 hours - 1%
No Opinion - 4%
Other - 10%

3. What is your preferred switch off time?
00.00 (Midnight) - 31%
01.00 - 36%
02:00 - 25%
No Opinion - 4%
Other - 4%

As can be seen from these responses, Hampshire have done very well to strike a balance from the consultation, and by no means could be accused of ploughing ahead with something people don't want. They really have listened.

Apparently, the policy on lighting had changed since I last checked anyway. The current policy is as follows:

Residential roads:
Dusk to 23:30 - dimming by 45%
23:30 to 05:30 - dimming by 65%
05:30 to dawn - dimming by 45%

Main roads:
Dusk to 23:30 - dimming by 25%
23:30 to 05:30 - dimming by 50%
05:30 to dawn - dimming by 30%

Dusk to dawn - dimming by 40%

This represented higher levels of dimming being implemented for an extra hour per night compared with the previous regime (except for CosmoPolis), with main road dimming approaching dawn being increased from 25% at the same time. So Hampshire had really squeezed as much out of dimming as they sustainably could.

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