LIGHTING EMITTING DIODE LAMP

摘要

A lighting emitting diode (LED) lamp (100) includes a first LED array (60) and a second LED array (50). A ratio of change of relatively luminous intensity relative to change of temperature of the first LED array is less than that of the second LED array. A first heat sink (10) thermally attaches to the first LED array. A second heat sink (20) thermally attaches to the second LED array. An active heat dissipating device (80) is in combination with the second heat sink for enhancing a heat dissipation efficiency of the second heat sink, and thus the heat dissipation efficiency of the second heat sink is greater than that of the first heat sink. The heat dissipation of the second LED array is much quicker than that of the first LED array. The second LED array thus can be kept working at a much less temperature.