In the International System of Units, the derived unit of luminous flux; the amount of light that falls on a unit area at unit distance from a source of one candela. Symbol: lm
Unit of luminous flux It is the amount of light which falls on one unit area when the surface area is at unit distance from 1 candela
The tubular space in blood vessels, such as the arteries, through which blood travels
A unit of illumination, being the amount of illumination of a unit area of spherical surface, due to a light of unit intensity placed at the center of the sphere
{i} unit for measuring the rate at which light is transmitted (Optics); cavity, hollow space (Anatomy, Botany)
a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions
A measure of the amount of light available from a light source equivalent to the light emitted by one candle
(lm) SI unit of luminous flux Radiometrically, it is determined from the radiant power Photometrically, it is the luminous flux emitted within a unit solid angle (one steradian) by a point source having a uniform luminous intensity of one candela
a cavity or passage in a tubular organ; "the lumen of the intestine" a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions