Lighting materials shown in the red glow and "light pipe" render great in CPU mode, but they don't in GPU mode. This is true for both emissive and area light materials. See the attached screen shots and KSP file.
Keyshot Pro Version 9.1.98
Geforce RTX 2060 - v 441.66 also tried latest driver with no success)
AMD Ryzen 9 3900X 12-Core Processor
16 GB RAM
Windows 10 Pro