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Half Coated Fluorescent Lamp
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Here's a interesting half coated fluorescent lamp also at the same display as the radial wave streetlight, The left inset is a close up shot of the clear end showing the end blackening there, while the right inset shows the coated end and the etch of the lamp.
The text below the lamp reads:
Enclosed Gas Lighting 1930-1940
The early experiments that led to neon lighting also led to the development of ‘enclosed gas’ lamps. In 1895 D. M. Moore experimented with carbon dioxide sealed in glass tubes. This produced a white light when a high voltage current passed through the gas. By 1904 these tubes were being used for retail lighting.
Sodium vapour and mercury arc lamps were developed before 1915 but were not commercially viable, nor really needed until the mid 1930s, when they were first used to illuminate highways and airports.
Fluorescent light was available in Europe by 1934 and was introduced in the United States in 1938. The fluorescent light is a low-pressure mercury arc lamp producing ultra-violet light that causes a coating inside the tube to ‘fluoresce’.
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![Half Coated Fluorescent Lamp
Here's a interesting half coated fluorescent lamp also at the same display as the radial wave streetlight, The left inset is a close up shot of the clear end showing the end blackening there, while the right inset shows the coated end and the etch of the lamp.
The text below the lamp reads:
[b]Enclosed Gas Lighting 1930-1940[/b]
The early experiments that led to neon lighting also led to the development of ‘enclosed gas’ lamps. In 1895 D. M. Moore experimented with carbon dioxide sealed in glass tubes. This produced a white light when a high voltage current passed through the gas. By 1904 these tubes were being used for retail lighting.
Sodium vapour and mercury arc lamps were developed before 1915 but were not commercially viable, nor really needed until the mid 1930s, when they were first used to illuminate highways and airports.
Fluorescent light was available in Europe by 1934 and was introduced in the United States in 1938. The fluorescent light is a low-pressure mercury arc lamp producing ultra-violet light that causes a coating inside the tube to ‘fluoresce’.
Keywords: Lighting_History](albums/userpics/normal_ClearFL.JPG "Click to view full size image
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Half Coated Fluorescent Lamp
Here's a interesting half coated fluorescent lamp also at the same display as the radial wave streetlight, The left inset is a close up shot of the clear end showing the end blackening there, while the right inset shows the coated end and the etch of the lamp.
The text below the lamp reads:
[b]Enclosed Gas Lighting 1930-1940[/b]
The early experiments that led to neon lighting also led to the development of ‘enclosed gas’ lamps. In 1895 D. M. Moore experimented with carbon dioxide sealed in glass tubes. This produced a white light when a high voltage current passed through the gas. By 1904 these tubes were being used for retail lighting.
Sodium vapour and mercury arc lamps were developed before 1915 but were not commercially viable, nor really needed until the mid 1930s, when they were first used to illuminate highways and airports.
Fluorescent light was available in Europe by 1934 and was introduced in the United States in 1938. The fluorescent light is a low-pressure mercury arc lamp producing ultra-violet light that causes a coating inside the tube to ‘fluoresce’.
Keywords: Lighting_History")
Anyways check out this '30s GE LPS light, I believe it's called a M-2: