GEC Z5580
Todays unexpected and amazing acquisition to the collection is this GEC Z5580 dating to 1965. It came from Pershore, and up to recently was one of two that survived in a small service road, both on GEC swan neck concrete columns. I believe this got removed due to spalling at the bracket/lantern join, allowing the steel tube inside to rust almost through, as what was left inside the lantern was very thin in places. 

Any work I've done so far has been minimal, the glass bowl only needed a quick scrub to remove the dust built up over its 56 years of service. I also cut the remains of the threaded tube to allow me to crush and remove it. Immediately after, I fitted it to my display swan neck and got some power to it. Unsurprisingly, it fired straight up, the lamp fitted at the time still working, however rather dimly. I put a fresh new lamp in which immediately brought its light output back up to scratch. The glass refractor bowl has to be the most impressive one I've ever seen, due to its immense clarity the light output is extremely well controlled.

The only thing that lets the lantern down is the hole drilled in for the P42 photocell, so restoration will include filling said hole in before I respray the canopy inside and out.

GEC Z5580

Todays unexpected and amazing acquisition to the collection is this GEC Z5580 dating to 1965. It came from Pershore, and up to recently was one of two that survived in a small service road, both on GEC swan neck concrete columns. I believe this got removed due to spalling at the bracket/lantern join, allowing the steel tube inside to rust almost through, as what was left inside the lantern was very thin in places.

Any work I've done so far has been minimal, the glass bowl only needed a quick scrub to remove the dust built up over its 56 years of service. I also cut the remains of the threaded tube to allow me to crush and remove it. Immediately after, I fitted it to my display swan neck and got some power to it. Unsurprisingly, it fired straight up, the lamp fitted at the time still working, however rather dimly. I put a fresh new lamp in which immediately brought its light output back up to scratch. The glass refractor bowl has to be the most impressive one I've ever seen, due to its immense clarity the light output is extremely well controlled.

The only thing that lets the lantern down is the hole drilled in for the P42 photocell, so restoration will include filling said hole in before I respray the canopy inside and out.

BC406934-9DA3-4F01-96BC-5752485C1110.jpeg IMG_20210816_144915827.jpg DSC07151.JPG DSC07152.JPG DSC07143.JPG
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Comment 1 to 5 of 5
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AngryHorse   [21 Aug, 2021 at 06:24 PM]
Glass bowl, mint, why didn’t ALL mercury lanterns have glass bowls, they would have probably lasted longer in service!, great score though Dave
dor123   [27 Apr, 2024 at 02:04 PM]
What is the lamp inside the lantern? Osram HQL-B Deluxe 80W?
Dave   [27 Apr, 2024 at 10:04 PM]
from memory its a GE MBF/U lamp.
dor123   [28 Apr, 2024 at 01:30 AM]
The lamp looks like globe rather than elliptical.
Dave   [20 May, 2024 at 09:22 PM]
That will be from the way the refractor bowl is designed, what you're seeing here is the main underside beam from the refractors in the bowl. This reduces light immediately downwards, instead spreading it along the road where the lights most needed, usually at a 165 degree beam angle. If I took a second image in the same position but higher up, you would see a more elliptical shape, difference being thatthe whole glass bowl would look like it has a lamp in it. Again this is designed to spread the light at 165 degree's. Its a simple, but extremely effective design that still outdoes LED in every way possible.

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