DSI - fluorescent dimming
Any dimming method used for dimming fluorescent fittings will typically require special "control gear" in the light fittings.
A popular dimming method for fluorescent lamps is DSI, it is supported by various lighting manufacturers.
One of the advantges with DSI dimming instead of other methods such as 0-10 volt dimming is that less C-Bus products are required to control the light.
DSI dimmers provide On/Off control and the dimming "level" control from the same unit, effectively saving the cost of a seperate relay unit for switching the light.
Programming of the C-Bus DSI unit is identical to standard C-Bus dimmers. | 
