Fun fact, most LED displays will only display a very specific wavelength of light for each primary color, if you can isolate the specific values of red, green, and blue, that the sphere uses in the LEDs in its displays, and get tint/filters for those wavelength ranges, you can effectively “tint” the windows where the sphere would be nearly impossible to see, while almost everything else would be fairly clear.

Almost all other light is broad spectrum, so even a single color item would reflect a much larger range of wavelengths than what the sphere produces, which may make red/green/blue objects less bright through the window, but they will still be observable, while the sphere is basically just black.