Putting LEDs inside something instantly increases its cool factor by 50%. What started as a miniature house that would forever sit lifeless on the layout is now more alive simply by adding some LEDs to liven up the place. The cool thing about these miniature N-Scale (which is tiny by the way!) buildings is that they've been built with acetate clear windows and internal floors. That means when I put 2 LEDs into the house then I can individually light up the top floor and the bottom separately. It's a nice touch and you can see the effect in the video below.