Definition of alights:
(v) :
To set light to (something); to set (something) on fire; to ignite, to light.
(adj) :
Burning, lit, on fire.
(v) :
To cast light on (something); to illuminate, to light up.
(v) :
(intransitive) (also figuratively) Often followed by at, on, or upon: of something aloft: to descend and settle; to land, to lodge, to rest.
(v) :
(intransitive) Often followed by from or off: to get off an animal which one has been riding; to dismount; to descend or exit from a vehicle; hence, to complete one's journey; to stop.
(adj) :
Often followed by with: shining with light; luminous, radiant; also, brightly coloured; vivid.