Rough version of some Green Lantern Corps for Batman the Brave and the Bold.
Green Lantern Corps is the name of an intergalactic police force appearing in comics published by DC Comics. They patrol the farthest reaches of the DC Universe at the behest of the Guardians; a race of immortals residing on the planet Oa. According to DC continuity, the Green Lantern Corps has been in existence for three billion years; surviving multiple conflicts both internal and foreign. Divided as pairs amongst the 3600 “sectors” of the universe, over 7200 members (known commonly as Green Lanterns) are estimated as serving within the Corps. Each Green Lantern is given a power ring, a weapon granting the use of incredible abilities that are directed by the wearer's own willpower.
Here is the beginning of that episode.