Pixel Map Image not able to get large enough

Hi Everyone,

I am trying to pixel map lights on the front of a house and I am having a problem where when I turn on the pixel map the image only effects a small part of the pixels I mapped. I tried to make the aspect ratio and other settings to their max and that helped a little bit but it still isn't large enough. Here is the show file if you want to play around with it.

Thanks in advance,