light up

verb

1. 1

   make lighter or brighter

   This lamp lightens the room a bit

2. 2

   begin to smoke

   After the meal, some of the diners lit up

3. 3

   start to burn with a bright flame

   The coal in the BBQ grill finally lit up

4. 4

   ignite

   The sky lit up quickly above the raging volcano

5. 5

   become clear

   The sky cleared after the storm