Description
See this App Note for details:
https://www.vishay.com/docs/84323/designingveml7700.pdf
It details the non-linear correction for higher lux conditions. There is also an automatic adjustment method (see Fig. 24) that could be implemented.
This has been done for the Arduino library, which may help as a reference:
https://github.com/adafruit/Adafruit_VEML7700