If the camera determines it needs a high shutter speed to correctly expose the scene, this may cause bands, strobing, or grey bars to appear in the video when placed next to a fluorescent light. This is because unlike incandescent lights, a fluorescent lights pulses at the electrical frequency of your region (50/60Hz). When the shutter speed is synchronized, or closely synchronized with the pulse rate, it can capture the gaps between the pulses which are not visible to the human eye.
The way to avoid this is to either locate the camera further away from the fluorescent light source, enable the correct electrical frequency compensation, set a specific shutter speed, or replace the light source with one that does not pulse.
Manually fixing the shutter speed can cause other problems, such as too bright an image when lighting conditions change. MV dynamically adjusts the shutter speed to correctly expose the scene and does not offer manual controls for this setting.