| 摘要 |
In a LED lamp, a thermally conductive electric insulator is filled in a cavity of a lamp base, a LED filament includes an AC LED device, a resistor is connected with the AC LED device in series between two electrodes of the lamp base to form an electric loop, and a reflective cup has a hole at a bottom thereof to expose the AC LED device and a reflective surface to reflect light of the AC LED device for providing a spotlight. The thermally conductive electric insulator mechanically contacts the LED filament and the first one of the two electrodes, and thereby establishes a heat dissipation channel from the AC LED device to the first electrode therethrough.
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