Casting Time: 1 action
Range: 120 feet
Components: V, S
Duration: Concentration, up to 10 minutes
As per this sickening radiance 5e spell it has the Dim, greenish light which spreads within a 30-foot-radius sphere that is centered on a particular point which you select within a range. Also the light spreads around the corners and even it lasts until unless the end of this spell.
Also read: message 5e spell
Whenever a creature shall move into a spell’s area almost for the first time on a turn or else starts its turn over there, that creature should be succeeded on a Constitution saving throw or else take 4d10 radiant damage and then it suffers one level of an exhaustion and also emits a dim, greenish light within a 5-foot-radius. Even though this light makes it impossible for a particular creature to benefit from being invisible. Of course the light and even any levels of exhaustion that has been caused by this spell go away when the spell ends.