Luminosity of the fruit-body can only be observed at night, or in a completely darkened room. Allow a couple of minutes for your eyes to adjust to the dark if coming from a well-lit area. The light emitted by luminous agarics is sufficient to be able to see the outline of the fruit-body. Luminous fruit-bodies can be photographed by their own light (with a very long exposure).

In some genera, rhizomorphs or mycelia may be luminous, but this feature refers only to luminosity of the fruit-body.

Choose this state if: the fruit-body is not luminous.