Light Up
WordNet
verb
(1) Make lighter or brighter
"This lamp lightens the room a bit"
(2) Begin to smoke
"After the meal, some of the diners lit up"
(3) Start to burn with a bright flame
"The coal in the BBQ grill finally lit up"
(4) Ignite
"The sky lit up quickly above the raging volcano"
(5) Become clear
"The sky cleared after the storm"