| Manufacturer: | Thorn Lighting |
| Model: | Atlas 100 Coiled Coil Crown Silvered - Blue |
| Application: | Decorative or Display Lighting |
| Wattage: | 100W (96W Measured) |
| Diameter (max): | 60mm (PS60 lamp shape) |
| Length: | 115mm |
| Tube Length: | N/A |
| Bulb/Tube material: | Clear glass, Blue coating |
| Colour Temperature: | Blue |
| Peak output wavelength: | Unknown |
| Total light output: | Unknown |
| Rated lifetime: | Unknown |
| Cap: | E27 - Brass |
| Operating voltage: | 240-250V |
| Operating current: | 0.4A Measured |
| Warmup/restrike time: | None |
| Cost (original): | Unknown |
| Place of manufacture: | England |
| Date of manufacture: | Unknown |
| Lamp Status: | Working |
This is certainly a bit of an oddball. Coloured lamps aren't that unusual. Crown silvered lamps aren't that unusual. However coloured AND crown silvered lamps are definitely unusual. This is the first one that I've ever encountered.
Unfortunately this is a powder coated lamp rather than one made of blue glass. Coated lamps like this tend to end up shedding their coloured coating if you so much look at them wrong, and sure enough, a couple of bits did part company with the lamp when I cleaned it up for photographing, despite my being extremely careful. This tends to be a particular problem with higher wattage lamps such as this, as the intense heat only works to further bake the coating, making it even more brittle.
Made by the unfortunately now defunct lighting division of Thorn, it's one I'm glad to have in the collection though due it being such an oddball.
I must deduce that this lamp was aimed more at the commercial market than the retail market, not least due to one bit on the cardboard sleeve which reads "THE ATLAS LAMP - for all Shops Offices & Factories" this makes me wonder, along with the fact that the stamp with the rating on the lamp actually stating that it uses a coiled coil filament, if this may be a long-life lamp as well. Hard to judge from the light output (long life lamps are usually somewhat dimmer for a given rating than their standard equivalent) due to the fact that the blue coating attenuates so much of the output, as you would expect.
My apologies for the somewhat overexposed photographs below - I didn't realise that I had the camera set up wrong until after I'd taken them - after which I had already put the lamp back into storage - I may retake them once I dig it out again in future.
Atlas 100W Crown Silvered Blue Coloured Lamp - General overview of lamp
Atlas 100W Crown Silvered Blue Coloured Lamp - Detail of lamp cap
Atlas 100W Crown Silvered Blue Coloured Lamp illuminating a wall in my room from a distance of approximately two metres
Atlas 100W Crown Silvered Blue Coloured Lamp - Overview of lamp while alight
Atlas 100W Crown Silvered Blue Coloured Lamp - Overview of lamp packaging
Atlas 100W Crown Silvered Blue Coloured Lamp - Held in hand to show scale
Atlas 100W Crown Silvered Blue Coloured Lamp - Displayed with ruler to show size of lamp
Atlas 100W Crown Silvered Blue Coloured Lamp Output Spectra
Atlas 100W Crown Silvered Blue Coloured Lamp - Detail of lamp etch
This lamp added to the Virtual Display Shelf on the 18th September 2007 at 21:13.
References: None.
Acknowledgements: Many thanks to the website reader who donated this lamp (amongst many, many others) for display.
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16th June 2023: Made changes to page formatting to improve readability on mobile devices and some background code changes to improve search engine behaviour.
