Lighting device

A lighting device comprising:

• a substrate having a first surface on which a light emitting element is provided and a second surface opposite the first surface;
• a radiator having one edge side to which the second surface of the substrate is attached;
• a cover which covers the substrate and is attached to the one edge side of the radiator;
• a lighting circuit provided on another edge side of the radiator and configured to light the light emitting element;
• and
• an air-cooling unit provided between the radiator and the lighting circuit and configured to allow for ventilation of an interior of the radiator,
• wherein the radiator includes a plurality of ventilation openings including:
• a suction opening configured to bring air into the interior of the radiator;
• and
• an air outlet configured to discharge the air, brought into the interior of the radiator through the suction hole, toward the cover to cause the discharged air to contact a surface of the cover.