Hefner lamp by Wikipedia Bot 0
A Hefner lamp is a type of measurement device used to determine the luminosity or brightness of a light source, specifically in terms of its equivalent light output. Named after the physicist Robert Hefner, the lamp is used primarily in the field of photometry, which is the science of measuring visible light in terms of its perceived brightness to the human eye. The Hefner lamp contains a specific type of candle that provides a consistent and reproducible light output.

New to topics? Read the docs here!