An adjustable support for lighting sources, including: - a mounting element for mounting on a mounting surface, - a support element to carry a light radiation source, the support element being hinged to the mounting element about an orientation axis to allow the orientation of said light radiation source with respect to said mounting surface, and - a mechanism for controlling the orientation movement of said support element with respect to said mounting element about said orientation axis, the mechanism including a first set and a second set (200, 160, 240) of cooperating elements mounted on one and on the other of said mounting element and said support element, respectively, wherein said first set of cooperating elements includes a first toothed sector, characterized in that, said adjustable support further comprises a second toothed sector arranged side by side, and said second set of cooperating elements includes: - a toothed actuator movable between an engagement position, in which said toothed actuator engages said first toothed sector and counters the orientation movement of said support element with respect to said mounting element about said orientation axis, and a disengagement position, in which said toothed actuator is disengaged from said first toothed sector, thus allowing the orientation movement of said support element with respect to said mounting element about said orientation axis, and - a rotary damper including a braked toothed wheel which meshes with said second toothed sector for braking the orientation movement of said support element with respect to said mounting element about said orientation axis. - a mounting element for mounting on a mounting surface, - a support element to carry a light radiation source, the support element being hinged to the mounting element about an orientation axis to allow the orientation of said light radiation source with respect to said mounting surface, and - a mechanism for controlling the orientation movement of said support element with respect to said mounting element about said orientation axis, the mechanism including a first set and a second set (200, 160, 240) of cooperating elements mounted on one and on the other of said mounting element and said support element, respectively, wherein said first set of cooperating elements includes a first toothed sector, characterized in that, said adjustable support further comprises a second toothed sector arranged side by side, and said second set of cooperating elements includes: - a toothed actuator movable between an engagement position, in which said toothed actuator engages said first toothed sector and counters the orientation movement of said support element with respect to said mounting element about said orientation axis, and a disengagement position, in which said toothed actuator is disengaged from said first toothed sector, thus allowing the orientation movement of said support element with respect to said mounting element about said orientation axis, and - a rotary damper including a braked toothed wheel which meshes with said second toothed sector for braking the orientation movement of said support element with respect to said mounting element about said orientation axis.