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PostPosted: Sat Dec 04, 2010 2:34 am 
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Simon Cornwell wrote:
The Philips MA lanterns were designed against BS1788 (a British Standard which describes how lanterns should be constructed and has led to dull uniformity of design)

I thought I'd just highlight this point, as it is worth bringing out again. There is an incredibly dull uniformity of how the basic components of modern lanterns are constructed... whether it be an Urbis ZX, Holophane QS, Phillips Iridium, or whatever, there is a pretty much identical lamp section in each lantern: A metal box with reflective insides (each lantern being slightly different as to how the reflectors are angled/machined), lamp in the middle, flat bottom. Simple as that, and it does quite restrict the designs of the lanterns themselves. It's only the shrinking lamp sizes that are pulling some lanterns down to a more bag-friendly size, as opposed to the lumbering lanterns the preceed them (The WRTL Arc and standard small sized Iridium are massive compared to the mercury and SOX lanterns they replace).

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PostPosted: Sat Dec 04, 2010 10:55 am 
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That BS which has led to a more generic design of lantern should be scrapped because newer lanterns such as the Iridium probably use more materials than a Phillip MA, or a GEC Z5590.

What should have happened is that the MBF instillations should have been kept but rewired and re-lamped therefore a 35w SOX could have been used in a modified ‘5590. E.g. deeper bowl so that the lamp can only just fit.

Since we’re now in the ‘Tenties’ most of the remaining MBF lanterns could be modified so that they can be adapted into running a MH lamp, it’ll look unusual like but it will save this country cost of replacing a small lantern with some homogenous, bland, cheaply manufactured lanterns aka the Iridium or the Arc.

The only example I can think of is what was done in Slindon, West Sussex which is possibly the cheapest method of lighting, by keeping the same lanterns but just adapt them a little so that a bowl can be fitted and the lamp changed from MBF to CFL.

What has also got me thinking is that when SOX becomes obsolete I wonder if the MA series of lanterns will actually be modified into running a LED or fluorescent just so that the lanterns life is extended.

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PostPosted: Sat Dec 04, 2010 11:39 pm 
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For the time being, I think SOX will remain in production for a while - because it is also used for other specialist lighting applications.
As for converting MBF lanterns, I would like to see it happen. The only drawback is that the new lamps would produce more intense light, and so some degree of cutoff may be required.... but in the post top lanterns you could get around this using a Baffle Cone

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PostPosted: Sat Dec 04, 2010 11:53 pm 
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I take it that a baffle cone is like frosted glass which disperses light in a more softer way.

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PostPosted: Sun Dec 05, 2010 1:11 am 
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Well, it's a series of metal veins that are shaped downwards to throw most light where it is needed, but tiny slit holes between the veins also allow for amenity illumination of nearby building fronts etc... you see baffle cones in use primarily in Globes

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PostPosted: Sun Dec 05, 2010 1:49 pm 
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Ah, so its those which are used in The Lanes in Carlisle, I know what you mean now.

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PostPosted: Mon Dec 06, 2010 1:19 am 
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Yep, just like on those globes. Imagine those fitted inside a clear-bowled Eleco Way or GEC post top, that is also internally-geared for 42w PL-T. If I was desiging modifications, The baffle cone would also come with plastic moulded refractors inside the cone.

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PostPosted: Thu Jan 13, 2011 10:12 pm 
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Does anybody know anything about the P567A? Apart from the new photograph depicting it as shinier, I'm not sure what the difference is as the PDF download is the same as before.


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PostPosted: Fri Jan 14, 2011 1:31 am 
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I'm going for a random guess here... possibly an Aluminium Canopy

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PostPosted: Fri Jan 14, 2011 5:22 am 
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The P567A has an aluminium canopy and can be mounted post-top without the need of an adaptor.


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