Abstract: A lighting device includes a base, a heat-conducting element, a heat-conducting column and two light-emitting components. The base includes a first surface and a second surface opposite to each other. The heat-conducting element is disposed on the first surface of the base. One end of the heat-conducting column is disposed on the second surface of the base and connected to heat-conducting element, and the heat-conducting column includes a first edge. The light-emitting components are disposed on two adjacent surfaces of said heat-conducting column separated by said first edge. The light-emitting components include two substrates and two light-emitting units. The substrates are disposed on two opposite sides of said first edge of said heat-conducting column, and each of the substrates includes a sidewall adjacent to the first edge. The light-emitting units are disposed on the substrates, and an outer edge of the light-emitting unit is adjacent to the corresponding sidewall.

Abstract: A saxophone mouthpiece, made in one piece, is comprised of a reed indicating a mild slope rising in arc backwards; a middle section receiving the reed and having its outer circumference indicating an approximately conic shape and a tail in a diameter smaller than that of the middle section being adapted to a crook of the saxophone; and an air duct penetrating inside the mouthpiece characterized by that the reed having a mild expansion from both sides of the reed at where it meets the middle section to provide closer contact of lips of its player with both sides of the reed when the mouthpiece is held in the mouth of the player for allowing easier and more concentrated playing.