This note, DES 6, originally published in August 2000, was revised and rewritten by Nancy Ruck in August 2001. The information herein is considered contemporary and relevant. Daylighting and the impact of daylighting strategies on the lighting, heating and cooling of buildings, is a vital issue to building owners, design professionals and building occupants with respect to energy use and associated carbon emissions. This paper introduces the concept of daylight-conscious building design and outlines strategies to realise and predict energy savings, which take into account the occupants’ visual and thermal comfort.