|Compare irradiance Ev, Sometimes called: illumination the luminous flux incident on unit area of a surface. It is measured in lux|
|a chattering or flighty, light-headed person.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|illuminance (ĭ-l'mə-nəns) Pronunciation Key
The luminous flux per unit area at any point on a surface exposed to incident light. It is measured in luxes. Also called illumination.