Wow! never saw the pulsing ones! Now I want one! Knew a girl that would look at the lights hooked up to the stereo and almost immediately fall on her donkey! She didn't know till years later she had some mild form of epilepsy!You could buy them at head shops, service merchandise, world bazar etc in 1970, I know. Some could even be wired into your amp to pulse with the beat![]()