Dr. Arthur Light was a genius who stole a special suit from his partner, Jacob Finlay whom he murdered (although some sources say the suit malfunctioned), and embarked on a villainous career as Dr. Light. He battled the Justice League several times and lost even joining supervillain teams. After losing to the JLA so many times, he eventually decided to attack the League's sidekicks in the Teen Titans but couldn't even beat a bunch of kids. Some sources place hauntings by Finlay's ghost as the reason for this incompetency.