Doctor Light is one of the non-playable characters in LEGO Dimensions 2: The Rise of Enoch, from the DC Comics franchise.
Jacob Finlay was a scientist at S.T.A.R. Labs who designed a suit which allowed the wearer to control light for a variety of effects and attempted to use this suit as a hero named Dr. Light. However, Finlay was accidentally killed by his colleague Arthur Light, who then took the suit and used it to become a villainous Dr. Light. Following this, Light has become a formidable adversary for the DC Universe, particularly the Justice League and the Teen Titans.