It sounds like you might be referring to one of these:
Increases the number of lighting events possible in a map and supports "gradient" transitions and precise RGB hex code colors. chroma qmod
If you need to rig a light on a crane, place a unit inside a moving car, or simply save hours of cabling time, the Chroma QMOD is the industry standard solution. It sounds like you might be referring to
Here are examples of how the Chroma mod transforms Beat Saber environments: chroma qmod