Why does the Riviera Cottage Roof (Wood) have no nighttime lighting?

Below are the three Riviera Cottage rooftops at night.

Riviera Cottage Roof (Stone):
http://en.ff14housing.com/images/pic...376e9_img2.jpg

Riviera Cottage Roof (Composite):
http://en.ff14housing.com/images/pic...7ebbd_img2.jpg

Riviera Cottage Roof (Wood):
http://en.ff14housing.com/images/pic...9e398_img2.jpg

The latter has (at night) no lighting on the roof coming from its interior. Can this please be changed to be in line with the other two examples? Was it just forgotten / a bug? It's quite odd that there would be large windowed openings on the roof, yet no light from within the house can be seen through them.