Scintillations are quick flashes of light.
Scintillations are usually pretty and exciting.
Examples:
The scintillations in the sky were so pretty.
I saw scintillations of light coming from the diamond.
The scintillations made the room look magical.
The scintillations in the water looked like little stars.
The scintillations in the cave were so bright, it was like a party!
The scintillations in the dark were scary, but also cool.