| 摘要 |
A lighting device of the present invention includes light emitting unit 20 having a light emitting element installed on a board, and body 11 having light emitting unit 20 mounted thereon. Body 11 has graphite having anisotropic heat conductivity, and the graphite has inner wall 11c in thermal contact with light emitting unit 20. The anisotropy of the graphite has direction Z having a first heat conductivity and direction X 1 having a second heat conductivity that is higher than the first heat conductivity. Inner wall 11 c of the graphite to which heat generated from light emitting unit 20 is transferred is formed to intersect with direction X 1 . |
