In this study, a thin plate-type heat pipe, instead of a solid aluminium heat sink, is used to eliminate heat released from LED components for lighting. Effects of the heat pipe size and installation angle are studied both in numerically and experimentally. According to the results, temperature on LED chip, when a heat pipe is used, is $1.2^{circ}C$ lower than using the conventional metal PCB. The overall temperature drop is $32^{circ}C$ if the heat pipe is properly used. The highest cooling performance is obtained in the case when the angle of a heat pipe installation is $90^{circ}$.