The RDF800C is a single-channel 800W fluorescent ballast controller. The RDF800C provides a 1-10V output for the control of high frequency regulating fluorescent ballasts. The unit is designed to be ceiling-mounted adjacent to the luminaries and will fit through a standard down light cut-out. Its compact design makes it easy to retro-fit, making scene-set installations as simple as possible. Each unit stores, in non-volatile RAM memory, its user definable addresses: up to 256 house and 256 room addresses, accommodating the largest of schemes. The dimmers also store their own channel addresses (up to 15 per room) and four user-programmable scene levels. Communication with other Rako devices such as the RCP keypads is via coded FM radio, eliminating the need for control wiring.