Visual brightness increases although the overall luminosity is largely unchanged. It shines with a luminosity of only 0.34 solar luminosities. The painting is striking for its inclusion of phosphorescent meteors, vaporous luminosity, and spectral protagonists. Stars are classified as supergiants on the basis of their spectral luminosity class. Many post-AGB stars receive spectral types with supergiant luminosity classes. Its spectral class is B8 and it has a luminosity of . Proper metallicity and size are also critical to low luminosity variation. Sirius appears bright because of its intrinsic luminosity and its proximity to the Solar System. The higher orders of deva shine with their own intrinsic luminosity. This corresponds to the radius calculated from the effective temperature and bolometric luminosity. Menkalinan has an absolute magnitude of 0.6 and a luminosity of . Stability, luminosity, and lifespan are all factors in stellar habitability. Those larger stars are easily distinguishable from brown dwarfs by their size and luminosity. It has a luminosity of and an absolute magnitude of 0.2. This does not include the solar neutrino luminosity, which would add .