can i create 2d light and darkness in unity ??

hi there
i want to create a dark area and a light . player cant seen this area without light . but i can not create 2d light in unity . i want to use a sprite for Light spectrum
(when i use defuse shader in unity all sprite get dark but player can see all object without light and also i can not use light spectrum :expressionless: )
here is a sample in construct 2 game engine :

This is a “completely” free asset to “complete” your need