Each and every object which is in a 20-foot cube within a specific range was outlined in the colors of blue, green, or violet light (depends upon your choice). Any of the creature in an area whenever this faerie fire 5e spell is cast is also outlined in a light if it will fail a dexterity saving throw. For a specific duration, objects and also the affected creatures would be shed dim light in a 10-foot radius.
Also check out: nondetection spell 5e
Any of the attack roll which is against an affected creature or an object has advantage if the attacker can able to see it, and also affected creature or an object can not be benefited from being an invisible.
Attributes Of 5E Faerie Fire
|Casting Time||1 action|
|Duration||Up to 1 minute|
|Target||Each object in a 20-foot cube within range|