Joe Glow, the Firefly is a 1941 Warner Bros. Looney Tunes cartoon directed by Chuck Jones. The short was released on March 8, 1941.
A fly with a lantern named Joe Glow enters a tent where a man (who is a caricature of Chuck Jones) is sleeping. Joe slips and slides all over the man's face and then investigates the food in the tent. Having looked everything over, Joe shouts "GOOD NIGHT!" into the man's ear.