 Okay, so a sun tunnel is probably the least expensive way to add natural light into the house. It doesn't take a huge remodel job to add one. You can put it into an existing roof. It's basically an acrylic bubble with a reflective tube that goes down to the ceiling. And it's great to add light to a bathroom or a hallway or maybe your walk-in closet. How big are they? I'm picturing like 8 to 10 inches?