"Clerestory plus ceiling bulbs shed light from above in this all-purpose party and guest room. In addition, more natural light flows through tall windows at the left, and more artificial light comes from wall fixtures in the sofa-bed niche. Fascinating ceiling lighting consists of twelve light tracks on which frosted 25-watt bulbs can be moved into endless patterns between cedar slats."
(Ok this might be the most decent one in the book. :D)
House and Garden's Complete Guide to Interior Decoration