Patent ID: 7465066

Claim:
An illumination apparatus comprising: a tubular housing made of a heat conductive material, configured with a receiving space, and having an open front end, and a closed rear end opposite to said front end in an axial direction of said housing; a lighting device disposed in said receiving space in said housing, said lighting device including a heat dissipating plate positioned in said housing and disposed adjacent to said front end of said housing, said heat dissipating plate having a mounting surface that faces said front end of said housing, a circuit board in thermal contact with said mounting surface of said heat dissipating plate, a plurality of lighting units, each of which has a light emitting diode mounted on said circuit board, and a condensing member mounted on said circuit board and disposed around said light emitting diode, and a driving unit disposed fixedly in said housing, connected electrically to said circuit board, and adapted to be coupled electrically to an external power source for activating said light emitting diodes of said lighting units; a transparent plate disposed in said housing and in front of said lighting units; an annular cap mounted on said front end of said housing and extending into said receiving space; and a seal washer disposed among and abutting against said housing, said transparent plate and said cap so as to establish a liquid-tight seal thereamong.