This is the core of the problem of aesthetics versus functionality that faces videoconferencing room design. The industry has not developed an angled fixture that will sit flush into an acoustic ceiling grid. Even if such a fixture existed, there would still be problems with the ceiling panel's position in comparison to the participants at different locations around a table. Specialized videoconferencing lights are available, and may be mounted to hang directly from any standard drop-ceiling grid. While a tripod mount offers more versatility than a ceiling mount, it may not be not sufficient as a permanent solution, as the fixtures will be underfoot and in the way of conference room traffic.
Cords running across the floor can also pose a hazard.
The way the camera evaluates the average lightness of an image on the screen, the White-Balance function of the system, is a critical factor in understanding the best way to fix a poor screen image. Thus, if a shot contains a high percentage of white or lighter tones, the system will attempt to darken the overall shot, making the darker sections even darker. In many cases, a subject sitting in front of light colored walls will quickly loose even more facial details and the unflattering shadows will actually increase. This effect is the cause of dark and undefined facial profiles in the midst of washed out white tones and hot-spots. People with darker skin tones are especially affected.