Before LED light strips and remotes, we had to do it the old-school way in the 1970s. If you wanted to make your room look cool, you went with black lights, lava lamps, strobe lights, flicker lights, and if you were really lucky, a color organ. This old Spiegel catalog page is a great reminder of just how different mood lighting was back then.
For me, it was number 7, the Listen-Light, also known as a color organ. You plugged it in, played your music, and the lights changed with the sound. Back then, that felt futuristic. Today it seems simple compared to all the LED lighting options out there, but in the 70s this stuff was magic. Which lights did you own?