luminosity

The Guardian's three star review said his "words glitter with feeling" and added that he "singularly shines, his luminosity putting the others slightly in the shade".

She found a relationship between their variation period, or pulse, and their intrinsic brightness or luminosity.

The most striking feature of the renovated cathedral is the luminosity of the stonework.

The M dwarfs are low-mass stars that have a mere fraction of the Sun's mass and luminosity.

The annual Perseid meteor shower requires us to leave behind our light-polluted cities for darker night skies that allow us to see the full luminosity of the celestial attraction.