Solatube International Inc. has made available its Integrated Solar NightLight, or ISn. During daylight hours, the solar panel inside of the Tubular Daylighting Device harvests and stores power so when the sun goes down it’s illuminated as a nightlight. The Integrated Solar NightLight is available for all Solatube residential daylighting systems. ISn models are eligible for a 30 percent tax credit on the entire system and installation. Using patented technology, a Solatube Daylighting System harvests daylight at the rooftop, transfers it down a highly reflective tube (which bends up to 90 degrees and can be up to 70 feet or more long) and distributes it evenly into an interior space through a diffuser at the ceiling.