| 摘要 |
A lighting device according to an aspect includes a light emitting module; a hollow frame of which a part of the outer circumferential surface is coupled to the light emitting module in a sliding manner; and a diffusion tube which has a space for accommodating the frame defined therein, surrounds and protects the frame and the light emitting module, and transmits light emitted from the light emitting module. The diffusion tube includes a first rib which protrudes from an inner upper side and is extended in a length direction, and a second rib which protrudes from inner both sides and is extended in the length direction. The frame includes a groove for accommodating the first rib as recessed from an upper surface thereof, and a third rib which protrudes from both sides and is mounted on the second rib. |
