| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device 1 excellent in heat radiation properties.SOLUTION: A lighting device 1 includes a fixed member 2 which has a lengthy concave part C on an upper face and has a linear groove D in a length direction on an inner face of the concave part C; a case 3 having a pair of covers 3a contacting with each of inner faces of the concave part C on both sides of the groove D, a supporting plate 3b connected to the pair of the covers 3a in separation from an upper face of the covers 3a and the groove D between the pair of the covers 3a, and a protruded part 3c provided on a lower face of the supporting plate 3b and contacting with the inner face of the groove D; and a semiconductor light-emitting element 4 provided on the supporting plate 3c inside the case 3. |
