(under the class definition) Subject matter wherein there are two or more spatially separate light sources at least two of which include an electrode containing carbon which is consumed during the operation of the device and means to modify the light therefrom.
SEE OR SEARCH THIS CLASS, SUBCLASS:
209+, for a carbon arc-type light source and means to modify the light therefrom.
228, for plural light source, one of which may be of the carbon arc type.
