"luminous flux." YourDictionary, n.d. Web. 27 May 2018. <http://www.yourdictionary.com/luminous-flux>.
luminous flux. (n.d.). Retrieved May 27th, 2018, from http://www.yourdictionary.com/luminous-flux
Radiant flux evaluated with respect to its luminous (brightness) efficiency. See also flux, luminance, and radiant flux.
The energy field generated by light. See lumen.