Editing Luminous flux (section)

==Units==
The [[SI]] unit of luminous flux is the [[lumen (unit)|lumen]] (lm). One lumen is defined as the luminous flux of light produced by a light source that emits one [[candela]] of [[luminous intensity]] over a solid angle of one [[steradian]].

<math display=block> 1\ \text{lm} = 1\ \text{cd} \times 1\ \text{sr}</math>

In other systems of units, luminous flux may have units of [[power (physics)|power]].