Yes, that's how science starts.

The first LED was a little glow of light from a spec of rock. They turned that into dim red and green indicator lamps a couple decades later. Decades later yet, someone figured out how to make a blue LED c. 1999 and, subsequently, how to then add a Uv-reactive yellow coating to give two opposite colors in significant luminance, creating the white LED seen absolutely everywhere now. The people who got lime green LEDs to work as power-on indicators didn't know how or when we were going to use LEDs as headlights