Lights in the office. Probably the biggest dispute of my working life. But I worked graveyard shift 25 years, and 3 am shift for 12 years. I would come in at 3 am and find ALL the lights off. That is absolutely the WORST thing overnight workers can do to mess up their Circadian rhythm. And those workers were always the ones who had the most trouble dealing with shift work. I always kept all the lights on at work, and had blackout curtains in my bedroom for when I slept during the day and clearly if I worked crazy hours for 37 years, I might have a little experience with that.
But in the big picture, it usually ended up with someone complaining to HR that it was too bright in the office. HR bringing in an outside lighting consultant. The consultant running around with light meters and finding that the light level at it's highest level was still below minimum OSHA standards. Usually because a number of the fluorescent tubes had burned out and needed to be replaced. Or they would find that half the tubes in fixtures had been loosened.......hmmm, wonder who did that?
Short answer, those complaining about light levels being too high usually found the light levels were too low and ended up being raised to meet OSHA standards. And every eye Doctor I have ever had would agree.