The Spring edition of Landscape looks at what landscape practitioners do with both light and sound. How we navigate and enjoy the city is often governed by the design of artificial light; yet the efforts that go into analysing the visual impact of changes to the landscape during daylight hours are not matched by a similar focus on the way in which light can be designed to illuminate, to dazzle, and at times, to destroy. Debates about wasted light are growing, and an increased awareness of climate emergency is focusing on the way in which the illumination of buildings, streets and highways is so often a poor use of energy. In the midst of the pandemic, the way in which we navigate the landscape during the day and the night has rarely been more important.