Wiktionary
n. (context physics English) The radiant energy of the visible portion of a spectrum of light
WordNet
n. the energy associated with visible light
Wikipedia
In photometry, luminous energy is the perceived energy of light. This is sometimes called the quantity of light. Luminous energy is not the same as radiant energy, the corresponding objective physical quantity. This is because the human eye can only see light in the visible spectrum and has different sensitivities to light of different wavelengths within the spectrum. When adapted for bright conditions ( photopic vision), the eye is most sensitive to light at a wavelength of 555 nm. Light with a given amount of radiant energy will have more luminous energy if the wavelength is 555 nm than if the wavelength is longer or shorter. Light whose wavelength is well outside the visible spectrum has a luminous energy of zero, regardless of the amount of radiant energy present.
The SI unit of luminous energy is the lumen second, which is unofficially known as the talbot in honor of William Henry Fox Talbot. In other systems of units, luminous energy may be expressed in basic units of energy.
Usage examples of "luminous energy".
Or they could move their assemblage points, without stopping, across their entire fields of luminous energy.
Like a faded painting on transparent silk, the image of herself and Sano climbing the mountain together hung between her and the turbulent, luminous energy wave.
Seen through the Force he was a maelstrom of luminous energy, a Force storm against which there was no shelter.
An all-enveloping green wave of luminous energy washed out from the small device and leveled those gathered like so many grass stalks plowed over by a flooding river.
All around them the air danced with shimmering columns of luminous energy.
If you are with friends, join hands around the tree and pass the light and energy between you from hand to hand, deosil, until you can feel the circle of light (you may even see luminous energy transferring from hand to hand).
Sisko watched a luminous energy pulse emanate from the second freighter and strike at Dolras's ship.