Abstract: A lighting apparatus includes a bulb-shaped cover, a heat sink unit disposed in an interior space of the bulb-shaped cover and including an end wall portion having a lateral surface and a tubular portion, and a light-emitting unit including a first circuit board disposed on the end wall portion, a second circuit board disposed around the tubular portion, a third circuit board including at least one extension which covers the lateral surface, and a plurality of light-emitting elements respectively mounted on the first and second circuit boards and the extension of the third circuit board. A tubular seat is coupled to the bulb-shaped cover. An electrical connector is coupled to the tubular seat.

Abstract: A lighting apparatus includes: a bulb; a heat sink unit disposed in an inner space of the bulb, and including an end wall portion and a sleeve portion; a light-emitting unit disposed on the heat sink unit and including a first circuit board disposed on the end wall portion, a second circuit board disposed around the sleeve portion, and a plurality of light-emitting elements; a heat insulating unit disposed at at least one of a position between the end wall portion and the first circuit board, and a position between the sleeve portion and the second circuit board; an annular seat coupled to the bulb; and an electrical connector coupled to the annular seat.

Abstract: A light bulb includes an enclosure, a heat-dissipating unit, and a lamp unit. The enclosure extends along an axis, and defines an inner space therein. The heat-dissipating unit includes a hollow first heat-dissipating element disposed in the inner space, a second heat-dissipating element surrounded by the first heat-dissipating element and extending along the axial direction, and an end heat-dissipating element mounted to the second heat-dissipating element at a distal end thereof. The lamp unit includes a first circuit board disposed at a periphery of the first heat-dissipating element, a second circuit board mounted on the end heat-dissipating element, and a plurality of light-emitting elements mounted on the first and second circuit boards for emitting light beams.

Abstract: A lighting apparatus includes: a bulb; a heat sink unit disposed in an inner space of the bulb, and including an end wall portion and a sleeve portion; a light-emitting unit disposed on the heat sink unit and including a first circuit board disposed on the end wall portion, a second circuit board disposed around the sleeve portion, and a plurality of light-emitting elements; a heat insulating unit disposed at at least one of a position between the end wall portion and the first circuit board, and a position between the sleeve portion and the second circuit board; an annular seat coupled to the bulb; and an electrical connector coupled to the annular seat.

Abstract: A light bulb includes an enclosure, a heat-dissipating unit, and a lamp unit. The enclosure extends along an axis, and defines an inner space therein. The heat-dissipating unit includes a hollow first heat-dissipating element disposed in the inner space, a second heat-dissipating element surrounded by the first heat-dissipating element and extending along the axial direction, and an end heat-dissipating element mounted to the second heat-dissipating element at a distal end thereof. The lamp unit includes a first circuit board disposed at a periphery of the first heat-dissipating element, a second circuit board mounted on the end heat-dissipating element, and a plurality of light-emitting elements mounted on the first and second circuit boards for emitting light beams.

Abstract: An energy-saving lighting fixture includes a light transmissive tubular enclosure including an inner tube defining an inner compartment therein, and an outer tube disposed around and spaced apart from the inner tube to define an outer compartment therebetween. As such, the tubular enclosure has a double-tube structure. A lamp assembly includes at least one lamp device disposed fixedly in the inner compartment of the tubular enclosure.