ID: 
1934
Maker's Name: 
GE
Where made: 
USA
Dimensions: 
1.2 × 1.2 × 13.7 cm

This small lamp was used for industrial lighting of equipment, for caravans, and domestic lighting in small spaces. It operates from the AC mains through a ballast (inductor) to limit the current drawn. A discharge through mercury vapour produces UV radiation that bombards the white coating to produce white light.