Patent ID: 8167452

Claim:
A lighting apparatus comprising: a housing; a light source disposed in the housing; and at least one adjustable assembly disposed at an end of the housing and comprising: a connection element fixed to the end of the housing; a cap capping the connection element, wherein the cap comprises a side wall, an end wall and an opening, the side wall is disposed at the end wall, the opening is disposed at the side wall and opposite to the end wall, the side wall and the end wall together form an accommodating space, the connection element passes through the opening, and a part of the connection element is located in the accommodating space; at least one electrical terminal disposed at the end wall and extending outside the cap, wherein the electrical terminal is electrically connected to the light source; and an adjusting mechanism comprising a gear, a positioning element, a clasp and a track, wherein one of the gear and the positioning element is disposed at the connection element, the other of the gear and the positioning element is disposed at the cap and located in the accommodating space, one of the clasp and the track is disposed at the connection element, and the other of the clasp and the track is disposed at the cap and located in the accommodating space; when the cap is at a first position, the positioning element is engaged with the gear to be restricted by the gear such that the cap is not rotated relative to the connection element; when the cap is at a second position, the positioning element is not restricted by the gear and the clasp is disposed at the track such that the cap is adapted to be rotated relative to the connection element and the clasp is adapted to slide along the track.