Cause

Fluorescent and high frequency lighting doesn't produce light in a steady manner, compared to say the light coming from the sun. Instead, these lighting sources pulse. For the human eye this is not discernible so for us they appear as steady light. 

However, cameras utilise a rolling shutter which means parts of the image are refreshed at different times. This is the same scenario that occurs when you see a plane's propeller in a video and the odd shapes the corresponding video creates. With a slow enough shutter speed a camera's feed will have an even distribution of light across the entire frame. However, when the shutter speed is a lot higher, because the parts of the frame are being refreshed so rapidly, you can pick up the variations in light caused by the pulsing characteristic of the fluorescent and high frequency lighting. 

The net effect is what appears to be blacking banding across the cameras feed. The power frequency from the mains power has a direct impact on the pulsing nature of these lights. This therefore means in certain locations dependent on mains frequency, banding can be experienced in one location but not others. The US for example utilises 60Hz compared to Europe which utilises 50Hz.

Resolution

If black banding is experienced on the camera, please contact Verkada Support. We will be able to assist in removing the visibility of this banding on the camera's feed by making the necessary changes to the camera's configuration.

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