Hey SANSTHEPUNNY. Sorry to hear that the office is too dark. I may be able to fix the problem, but I need to know a few more things so I can better determine what the issue is.
If possible, can you take a screenshot of the game and post it either in a reply here, or on a platform like Imgur? That way I can take a look and see if it is a shader/graphics conflict with the game.
What platform are you running the game on? Are you running the game on desktop (Windows, MacOS, Linux), web (WebGL), or Mobile (Android).
If you are running the game on Android, are you running the gamma version or the normal version? Have you tried the gamma version? If you are not running the game on Android, have you tried the legacy effects? The legacy effects are slightly brighter overall, so maybe that will help.