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Joined: Jan 2010
Posts: 1,902 Likes: 4
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If your spending a miillion or more on led bulbs wouldnt it be cheaper to buy direct from manufacturer Urbis rather than a middleman Maclean Electrical. Would have thought urbis could wire them as necessary. I don't think they are led bulbs. The LEDs are built into the fitting. LEDs are more efficient and generate less heat than conventional lights, but they are more heat sensitive. The efficiency drops off with temperature so they need better heat sinks - fins etc. You need a whole different fitting.
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Noticed them on the road from Spital dam to lower Bebington (Bromborough road??) the other evening. They were quite impressive and gave a good clear white light. They are the recent High Pressure Sodium lamps, not LED. The lit area and quality is nearly identical but on LED ones you can see the two parallel rows of LED's when you look at the lamps, on these HPS lamps you can see a slight orange tint looking at the light itself.
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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Things aren't boding too well.
Looked at the new LED lighting on Old Chester Road between Holborn Square and Birkett Road, at least 7 of the new lights aren't working.
Most of the lighting seems adequate (nothing special) but in areas where there isn't lights from shops or houses etc the pavements aren't well lit between lamp posts, I wouldn't be able to recognise faces of people I drove past.
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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Drove along the New Ferry bypass yesterday, where they have started installing them. The difference between the LEDs and the old sodium lamps' illumination levels is dramatic.
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I'm still waiting for a short lamppost street.
Agree on new ferry bypass, they seem to have pulled out the stops there.
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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I think they are going for radial routes out of Birkenhead first. I notice the Old Chester road in Bebington is seeing them now. Perhaps they'll do connecting roads next, followed by side streets - if there are led lights to spare.
I've always hated the yellow sodium lights. they make everyone look ill, and wash out all colour from everything. The white light from leds is much more cheering I think.
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Pinzgauer
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Pinzgauer
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I think they are going for radial routes out of Birkenhead first. I notice the Old Chester road in Bebington is seeing them now. Perhaps they'll do connecting roads next, followed by side streets - if there are led lights to spare.
I've always hated the yellow sodium lights. they make everyone look ill, and wash out all colour from everything. The white light from leds is much more cheering I think. Yes indeed. Low pressure sodium (SOX) lamps blat most of the colour out of things. High pressure ones (SON) aren't much better either. However, the lamps that made you look as healthy as the Thing from the Swamp were the older mercury vapour lamps. They weren't colour corrected at all. ie. no phosphor coating internally. Woodchurch Road and Storeton Road had these in Metro-Vick and GEC lanterns up until the early 1970's. By comparison, someone on the mortuary slab looked pretty healthy compared to someone standing under one of those lamps ! 
Last edited by Pinzgauer; 10th Dec 2015 11:29am. Reason: Forgot an apostrophe !!
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No problem with how you looked when we had the gas lamps in side the streets during the 40s
Ships that pass in the night, seldom seen and soon forgoten
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Pinzgauer
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I agree Jim. We had gas lamps in our road until the mid 60's. A cottage I visit occasionally in the Borders hills is waaaay off grid. It has gas lights throughout, albeit bottled gas. The "hiss" and "plop" of the mantle as you light it, the warm yellowish/greenish white glow - all magical stuff! The dark discolouration on the ceiling above the wall lights adds a certain something too (?).
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Yes, I remember them in my primary school where there was no electricity. They were lit on a dark winter's afternoon by the teacher standing on a desk with a box of matches. They spread not only light but warmth and were much liked.
But the white light was due to Thorium which is mildly radioactive, and probably they were not very healthy things to have around the house. They were fragile and didn't last long and I would not be surprised to find measurable levels of radioactivity in the floors and ceilings around where they once were due to remainsof old mantles.
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Arrowe Brook Road now has LED's, Old Chester Road has more added.
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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Well on the Rock Ferry bypass, work has come to a standstill. No change from last week. Only one side has been upgraded, and that is patchy. Some of the new lights appear not to be working.
It occurs to me that as these things are controlled by radio, it probably won't be long before someone finds a way to hack them, and switch them on and off for fun like christmas lights!
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I notice that in mist or drizzle one can see a beam of light from these LED lamps when looking from the side. It is not visible from sodium lights, and at first I thought it might be because they are brighter. But on thinking about it, it is more likely to be due to the blue component in the light being more scattered due to its shorter wavelength, which means that they will be more attenuated by fog at ground level. It will be interesting to see how they perform in darkness and fog.
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I've been wondering the same, Philips claim ... LED delivers greater visibility in rain and fog
• Initial research shows that visibility in rain and fog is defined by two parameters: the amount of light scattering and the penetration of the light.
• The water droplets in the fog acts like tiny mirrors and causes unwanted light scattering (or glare) that affect the vision of road users.
How much light does a road surface need?
The CIE standard prescribes the amount of light required for various road categories. This requires an expressway (M1), for example, to be lit evenly at 2 candelas per square meter. However, some road lighting systems throw less light than the standard on the road surface, citing the ability of our eyes to see better with lamps offering more blue light. This is a controversial interpretation of Scopotic/Photopic (S/P) ratio, and in our opinion, leads to a dangerously under-lit road surface.
• This same research shows that white LED light produces less glare than yellow SON light in rain and fog conditions, also the penetration factor is favorable for LED.
• Some research shows that LED road lamps achieve greater light penetration through fog.
* Research in the performance of various lighting technologies or color temperatures in rain and fog conditions, is still in its infancy. No full consensus has been reached in the academic world on this topic yet. (Source: Investigation of LED Light Attenuation in Fog, K. Otas, V. J. Pakenas, A. Vaskys, P. Vaskys (2012)
ISSN: 1392 – 1215)
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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