Daylight is the reference standard by which all other light sources are compared and can be particularly beneficial in achieving sustainable building design goals. This course will discuss the physical and psychological importance of daylighting, and will examine how optically complex fenestration products such as tubular daylighting devices (TDDs) can be used to optimize daylighting solutions. We will also explore new, better-defined performance metrics for measuring daylighting as well as a new daylight simulation tool that can help architects quickly apply key daylighting metrics and accurately predict daylight performance when designing with optically complex fenestration products.