Lamp assembly comprising a ventilation passage

A lamp assembly comprising a housing for a light source having a light transmitting cover, and means defining a ventilating passage providing communication between an interior and an exterior of said housing, said means defining a ventilation passage comprising (i) a tubular portion which extends from said housing and which has a continuous side wall with a top end, and (ii) a cap which is mounted on said tubular portion and which has an end wall and spaced lateral walls, each lateral wall having a lower edge;

• wherein said cap is mounted on said tubular portion so that said end wall of said cap is spaced outward and apart from said top end of said tubular portion and is joined with said lateral walls of said cap so as to define a downwardly opening slot and wherein said end wall of said cap projects downwardly beyond said lower edges of said lateral walls of said cap and has a lower edge region which is chamfered on at least one surface of said end wall.