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.
Hugh Hefner | LAMP | Arc lamp | LED lamp | LAMP (software bundle) | lamp (electrical component) | Lamp | lamp | arc lamp | The Blue Lamp | safety lamp | Philip Hefner | Neon lamp | High-intensity discharge lamp | Compact fluorescent lamp | Carbide lamp | Bill Hefner | ''When It's Lamp Lighting Time In The Valley'' | When It's Lamp Lighting Time in the Valley | Tiffany lamp | ''The lady with the lamp'' — Miss Nightingale at Selimiye Barracks | Signal lamp | Safety lamp | Robert A. Hefner, Jr. | Robert A. Hefner | Oil lamp | Metal-halide lamp | Lake Hefner | Hugh M. Hefner First Amendment Award | Hefner lamp |