| 摘要 |
Provided is a lighting system having a printed circuit board on which a plurality of light emitting diodes are arranged; a base holding the printed circuit board; a heat sink provided on a lateral side of the base in a horizontal direction of the printed circuit board; a heat pipe which connects the base with the heat sink; and a rotating unit provided in at least end portion of one end portions and the other end portions of the base or the heat sink, to easily control the illuminating angle and the illuminating range and therefore to improve the energy efficiency, and to improve the heat-radiating property since the heat sink is provided in the lateral side of the substrate of heat-generating member. |
