Lighting apparatus

A lighting apparatus, comprising:

• an exterior housing, wherein the exterior housing is configured to be installed in a ceiling cavity and includes an exposure opening through which light exits the lighting apparatus;
• a light module disposed within the exterior housing, wherein the light module defines an internal space;
• a light source plate disposed in the internal space of the light module;
• a light source mounted on the light source plate, wherein the light source is configured to generate illumination;
• a light passing cover disposed at the exposure opening of the light module, wherein the light passing cover is configured to allow light emitted by the light source to pass therethrough;
• and
• a guiding structure disposed between the light module and the exterior housing, wherein the guiding structure is configured to guide movement of the light module relative to the exterior housing so as to adjust a relative height between the light source and the exposure opening, thereby adjusting a light spreading pattern of light emitted from the lighting apparatus.