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 (X), 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 (X), 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 . <EOS>