Certain characteristics of the emitted light change with temperature, including brightness, color, and afterglow duration.
en.wikipedia.org A plasma afterglow can either be a temporal, due to an interrupted (pulsed) plasma source, or a spatial one, due to a distant plasma source.
en.wikipedia.org About 18 aircraft approached from the north and circling over land, delivered a beam attack against the ships that were silhouetted against the afterglow.
en.wikipedia.org After the unusually long duration of gamma emissions, x-ray emissions in the afterglow continued for just two days, an unusually short duration for this phase.
en.wikipedia.org Fine-tuning of some parameters (i.e., radiation hardness, afterglow, transparency) can be achieved by varying the conditions of the crystal growth.
en.wikipedia.org