A fishing light system includes: an alternating current power source, a power supply device electrically connected to the alternating current power source, and a light emitting diode fishing lamp electrically connected to the power supply device. The LED fishing lamp is used in combination with the power supply device which is capable of converting alternating current into a power supply which a voltage peak value and a voltage valley value. Since the power supply device is not needed to covert alternating current into direction current, there is no need for the power supply device to be equipped with a coil transformer, which consequently reduces the volume, weight and cost of the fishing light system of the present invention.
