A fusion radiator that can be placed in planetary orbit to provide light to sunless planets or night-light for any number of commercial or military applications. A typical Sunsatt will provide light for one standard month without maintenance, though some of the better ones can provide both light and heat for almost a year. While hailed as one of the legitimate betterments of life produced by the Empire, it nevertheless has been used to hold colonies or even worlds to ransom.
The Sunsatt can also be turned on/off via transmitter.