Patent ID: 8814396

Claim:
A lighting apparatus, comprising: an optical unit comprising a light emitting module that includes a light emitting element mounted on a substrate, and a lens configured to control distribution of light from the light emitting module; a unit mounting plate comprising a front surface on which the optical unit is disposed, and a back surface; a power supply apparatus comprising a lighting circuit configured to cause the light emitting element to light; and a body comprising an irradiation opening part and an opposite part opposite to the irradiation opening part, the irradiation opening part comprising an irradiating opening through which the optical unit irradiates light, and a translucent plate arranged in parallel with the unit mounting plate and arranged so as to cover the irradiating opening, wherein the opposite part comprises a surface opposing the back surface of the unit mounting plate, wherein the unit mounting plate is mounted to the irradiation opening part and wherein the power supply apparatus is mounted to the opposite part, wherein a first distance between the front surface of the unit mounting plate and the translucent plate, at any point along a cross-section of the lighting apparatus, is less than a second distance between the back surface of the unit mounting plate and the surface of the body opposing the back surface, wherein the first and second distances are measured perpendicularly to the unit mounting plate, and wherein the power supply apparatus is located in a space formed between the back surface of the unit mounting plate and the surface of the body opposing the back surface.