Two lights, one far below and to the left of the other, seen on Route 91 getting off the exit to Holyoke Mall. Both objects were small, orblike, and flashed in alternating red and green, similar to past sightings in area. From the ground (after exiting car) topmost orb seemed to hover from left to right. Observer is a university student, does not drink or take illicit drugs, is sound of mind and has no history of hallucinations or serious mental disorders.