Question

alight
I
 /əˈlaıt/  verb  , alights, alight·ed, alight·ing [  no obj  ]
   somewhat formal  
  1 of insects, birds, etc. : to stop on a surface after flying
   A butterfly alighted [=landed] on her hat.
  2 : to step down from a boat, vehicle, etc.
   A group of tourists alighted from the boat/bus/train.
  alight on/upon [  phrasal verb  ]
   alight on/upon (something) : to see, notice, or think of (something)
    Her eye/eyes alighted on a strange man in the crowd.
    a speaker who easily alights upon topics that interest a wide audience
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II
  adj  , not used before a noun
  1 : full of light : lighted up
   The sky was alight with stars.
  — often used figuratively
   a face alight with excitement
   The children laughed, their eyes alight.
  2 chiefly Brit : on fire : ablaze, afire
   Enemy soldiers set the building alight.