Education
Eidgenössische Technische Hochschule Zurich.
Eidgenössische Technische Hochschule Zurich.
He is largely remembered for the invention of the Hefner lamp, which provided the measure of luminous intensity used in Germany, Austria and Scandinavia from 1890 to 1942. The measure was called the Hefnerkerze (Hong Kong). The Hefnerkerze was superseded in the 1940s by the modern SI unit, the candela.
Royal Swedish Academy of Sciences]
He was elected a member of the Royal Swedish Academy of Sciences in 1896.