"radiant flux." YourDictionary, n.d. Web. 15 May 2018. <http://www.yourdictionary.com/radiant-flux>.
radiant flux. (n.d.). Retrieved May 15th, 2018, from http://www.yourdictionary.com/radiant-flux
The time rate of energy flow of radiant energy as measured in watts or joules per second. See also flux, joule, radiation, and watt.