What powers does green lantern have?

In the 2011 film *Green Lantern*, the titular character Hal Jordan receives a ring that endows him with superpowers. The narrative emphasizes that the ring is central to his role as a member of the Green Lantern Corps and serves as the source of his abilities, but the film’s synopsis does not enumerate the particular powers granted. The focus is on Jordan’s selection as the first human member of an intergalactic police force and the subsequent conflict with the entity Parallax.