Lighting device and light installation method

A lighting device comprising:

• a first lighting unit;
• and
• a second lighting unit,
• each of the first and second lighting units including:
• a chassis having a front surface and a rear surface opposite to the front surface;
• a plurality of light sources disposed on the front surface of the chassis;
• an adapter disposed on the rear surface of the chassis and insertable into a mounting hole on a mounting surface of a building material for attachment of the lighting unit to the mounting surface;
• and
• a light-transmissive cover covering the plurality of light sources, wherein
• the first lighting unit includes a first coupler disposed on the rear surface at a first end of the first lighting unit,
• the second lighting unit includes a second coupler disposed the rear surface at a second end of the second lighting unit, and
• the first coupler is couplable to the second coupler with a first end portion of the light-transmissive cover of the first lighting unit at the first end in contact with a second end portion of the second lighting unit at the second end.

A lighting device comprising:

• a chassis having a front surface and a rear surface opposite to the front surface;
• a plurality of light sources disposed on the front surface of the chassis;
• an adapter disposed on the rear surface of the chassis and insertable into a mounting hole on a mounting surface of a building material for attachment of the lighting device to the mounting surface;
• and
• a detachment member coupled to the adapter, the detachment member configured to cause the adapter to transition between an attachment state and a detachable state, wherein
• the adapter is movable relative to the chassis in a first direction along the rear surface of the chassis between a first position at which the detachment member is fully behind the rear surface of the chassis and a second position at which the detachment member is at least partially exposed out of the chassis.

A light installation method comprising:

• installing a first lighting unit including a first adapter and a first coupler on a rear side thereof to a mounting surface of a building material by inserting the first adapter into a first mounting hole on the mounting surface and fixing the first adapter to a first attachment member in the first mounting hole, the first coupler;
• installing a second lighting unit including a second adapter and a second coupler on a rear side thereof to the mounting surface by inserting the second adapter into a second mounting hole on the mounting surface and fixing the second adapter to a second attachment member in the second mounting hole while positioning the second coupler adjacent to the first coupler;
• and
• coupling the second coupler to the first coupler and adjusting a relative position of the second lighting unit with respect to the first lighting unit, by moving at least one of the first and second lighting units along the mounting surface.