Proper Brightness. If light levels are too low, it can make people drowsy during the meeting. On the other hand, if the lights are too bright, it’s distracting, making people restless. Also consider proper light levels for taking notes and reading handouts or other materials, and the fact that people whose eyes aren’t as good may require slightly more light for those purposes. Do some testing of your light levels to make sure you have the ideal brightness for the room.