building a black out box for an exterior light?

[Clay Hammons]

I have a 2k light that will be outside shining in through a window, the light is tungsten so I wanted to figure out a way to block the sunlight around it. The window is about 2ft x 3ft, the light will be about 2-3 feet away from the window. Im trying to figure out what materials to use and do it as inexpensively as possible. The interior lights are tungsten as well so I don't want to gel the light blue and then gel the window orange because it would stop the light down too much.

 

Thanks in advance for any help!!