The history of lamp design in Denmark, focusing on 100 lamp designs dating back to the 19th century. The book takes the iconic PH lamp, designed by Poul Henningsen in 1925, as a starting point and examines the development of lamp design in Denmark, from oil and gas lamps to incandescent bulbs.

With over 300 illustrations, the book provides a detailed survey of Danish design, emphasizing the importance of ambience in lighting and its role in promoting hygge - the concept of a "warm and cozy" atmosphere. The book features prominent designers like Arne Jacobsen and Verner Panton, showcasing their contributions to Danish lamp design.