Solar tubes, also known as sun tunnels or tubular skylights, are innovative daylighting systems designed to bring natural sunlight into interior spaces where traditional skylights or windows may not be practical. They consist of a dome or collector installed on the roof, a highly reflective tube that channels sunlight, and a diffuser that spreads the light evenly into the room below.

These systems are popular for their energy efficiency, as they reduce the need for artificial lighting during the day, and for their ability to brighten up dark areas such as hallways, bathrooms, closets, and other interior rooms. Solar tubes are relatively easy to install compared to traditional skylights, require minimal structural changes, and are generally more affordable.