Ironically this would create a better surveillance net. With a high light in the background you obtain black silhouettes. With low or none light in the backgro

Ironically this would create a better surveillance net. With a high light in the background you obtain black silhouettes. With low or none light in the background UV cameras are perfectly able to take photos in pitch black, and a low level of light gave you faces of the suspects instead. So perhaps, maybe, "speculation in action", this is not only useful or exclusively about insects