Lamp bulb, discharge

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OBJECT TYPE: fluorescent/tube/bipin/preheat hot cathode
DATE: 1945–1950
ARTIFACT NUMBER: 1992.2955.002

MANUFACTURER: General Electric
MODEL: F20T12 Warm White 13
LOCATION: Canada

More Information

General Information

Serial #: N/A
Part Number: 2
Total Parts: 2
AKA: N/A
Patents: N/A
General Description: Glass tube coated with white phosphor/ metal parts/ synthetic parts

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 60.5 cm
Width: N/A
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: 3.9 cm
Volume: N/A

Lexicon

Group: Lighting Technology
Category: Lamp bulbs
Sub-Category: N/A

Manufacturer

AKA: General Electric
Country: Canada
State/Province: Unknown
City: Unknown

Context

Country: North America
State/Province: Unknown
Period: Late 1940s +
Canada: An example of a lamp bulb made and used in Canada, part of a large and varied collection of over 7500 electrical items acquired and documented by Ontario Hydro in the 1960s. The collection was thought to be the largest and most comprehensive of its kind in Canada and was donated to the Canada Science and Technology Museum in 1992
Function: A device used to provide illumination by means of an electric current which excites mercury vapour in a glass tube, producing short-wave ultraviolet light that then creates fluorescence, producing visible light.
Technical: An early example of a fluorescent bulb. The Preheat model was an early type of fluorescent amp. Cathodes had to be pre-heated to electron emitting temperatures before the lamp would light. This lamp required the use of a separate starter which supplied several seconds of current flow through the cathodes to pre-heat them between the time the tube was turned on and the time the lamp emitted light.
Area Notes: Unknown

Details

Markings: Black lettering on glass reads 'GENERAL GE [logo] ELECTRIC/ F20-T12-W.W. WARM WHITE/ MADE IN CANADA/ 13'
Missing: Appears complete
Finish: White tube/ metallic and black end caps
Decoration: N/A

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If you choose to share our information about this collection object, please cite:

General Electric, Lamp bulb, discharge, between 1945–1950, Artifact no. 1992.2955, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1992.2955.002/

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