The term 'LIGHT-FLOW MEASURE' is a measurement of the amount of light that is emitted from a source. The crossword solution for this term is 'LUMEN, ' which is a unit of measurement used to measure the amount of light emitted from a source. Lumens are often used to measure the brightness of a light source, such as a light bulb or a flashlight. Lumens are also used to measure the intensity of light in a given area.