Patent ID: 8796943

Claim:
An LED lamp including a pair of input terminal parts, a rectifier circuit unit rectifying an AC inputted from outside to the pair of input terminal parts to a DC, and an LED unit emitting light by electrification of the DC outputted from the rectifier circuit unit wherein: a PWM control unit capable of performing PWM control of a current to flow through the LED unit according to a duty ratio is provided in a circuit between the rectifier circuit unit and the LED unit; the PWM control unit is switchable between a case where the PWM control of the current flowing through the LED unit is performed, and a case where the PWM control of the current flowing through the LED unit is not performed, according to a frequency of external AC inputted to the pair of input terminal parts; and the PWM control unit performs the PWM control of the current flowing through the LED unit by driving a pulse at a frequency higher than a predetermined frequency when the frequency of the external AC inputted to the pair of input terminal parts is lower than the predetermined frequency, and does not perform the PWM control of the current flowing through the LED unit when the frequency of the external AC inputted to the pair of input terminal parts is higher than the predetermined frequency.