An inductive neon lamp set comprises a neon lamp and a circuit system comprising a speech detecting circuit for receiving a sound signal. The sound signal so received is amplified by a speech amplifying circuit of the circuit system which further comprises a power control circuit and a high voltage oscillating circuit. The neon lamp is caused to glow variably by various output signals delivered thereto from the high voltage oscillating circuit. The glowing variation of the neon lamp is dependent on the intensity of the sound signal received by the speech detecting signal.