Illumination system, comprising: - a feed and control bar; and - at least one illumination device (100; 100') which is couplable to the feed and control bar, in any axial position along said feed and control bar, wherein: - the feed and control bar comprises: - a bar body which extends longitudinally along a bar axis, is suitable for being fixed to a support, for example a ceiling or a wall, and forms a body seat defining a longitudinal opening in the bar body; - a feed line which extends along the bar body; - a digital control line which extends along the bar body; and wherein - each illumination device (100; 100') is provided with: - mechanical connection means suitable for interacting with the bar body in order to mechanically support the illumination device (100; 100') on the feed and control bar; - feed contacts suitable for establishing electrical contact with the feed line so as to feed electricity to the illumination device (100; 100'); - control contacts suitable for establishing electrical contact with the digital control line so as to allow the illumination device (100; 100') to be controlled by a remote control unit; - an electronic processing unit operatively connected to the control contacts; wherein - the mechanical connection means and the feed and control contacts extend from a connecting portion of the illumination device (100; 100') that rests against the bar body when said mechanical connection means are hooked on the bar body; characterised in that: - the mechanical connection means comprise a pair of anchoring arms suitable for snap engaging a pair of parallel lateral walls of the bar body which delimit the body seat. - a feed and control bar; and - at least one illumination device (100; 100') which is couplable to the feed and control bar, in any axial position along said feed and control bar, - the feed and control bar comprises: - a bar body which extends longitudinally along a bar axis, is suitable for being fixed to a support, for example a ceiling or a wall, and forms a body seat defining a longitudinal opening in the bar body; - a feed line which extends along the bar body; - a digital control line which extends along the bar body; and wherein - each illumination device (100; 100') is provided with: - mechanical connection means suitable for interacting with the bar body in order to mechanically support the illumination device (100; 100') on the feed and control bar; - feed contacts suitable for establishing electrical contact with the feed line so as to feed electricity to the illumination device (100; 100'); - control contacts suitable for establishing electrical contact with the digital control line so as to allow the illumination device (100; 100') to be controlled by a remote control unit; - an electronic processing unit operatively connected to the control contacts; wherein - the mechanical connection means and the feed and control contacts extend from a connecting portion of the illumination device (100; 100') that rests against the bar body when said mechanical connection means are hooked on the bar body; - the mechanical connection means comprise a pair of anchoring arms suitable for snap engaging a pair of parallel lateral walls of the bar body which delimit the body seat.