As the title.
In this control system, there is a photosensor to sense the light intensity and a occupancy sensor. When there is a user entering the room the occ sensor will sensed and photosensor will sense the light intensity outside the window. If it is above 500 lux it will not on the light and below 500lux dimming ballast will come into place. Do anyone know what is the proportion or how the dimming ballast varies?