Holding device, comprising - a support rail extending along a longitudinal axis in the form of a luminaire component or in the form of a holding part for a light, wherein the support rail is provided for installation into an installation opening, which is formed in a suspended ceiling, wherein a light outlet opening is limited by the support rail, which has a direction perpendicular to the longitudinal axis, - a holding element for holding the support rail in the installation opening, - an attack element, wherein the design is in such a way that the holding element is moved to a holding position for holding the support rail in the mounting opening by means of a rotation and a subsequent translation movement in the direction, starting from a mounting position, characterized in that that the holding element comprises a base region and two of which extends from the base area from extending foot areas, which: • are designed in a plate form, • in the mounting position of the retaining element parallel to the longitudinal axis, • located in the holding position of the holding element on two sides opposite the support rail, • in each case have a particularly edge-shaped edge area, wherein the peripheral regions are considered along the longitudinal axis, in order to separate a longitudinal distance (Δ) from each other, such that the rotation of the holding element is limited from the mounting position, in such a way that at least one of the peripheral regions in the system reaches at least one outside of the traverse. - a support rail extending along a longitudinal axis in the form of a luminaire component or in the form of a holding part for a light, wherein the support rail is provided for installation into an installation opening, which is formed in a suspended ceiling, wherein a light outlet opening is limited by the support rail, which has a direction perpendicular to the longitudinal axis, - a holding element for holding the support rail in the installation opening, - an attack element, wherein the design is in such a way that the holding element is moved to a holding position for holding the support rail in the mounting opening by means of a rotation and a subsequent translation movement in the direction, starting from a mounting position, characterized in that that the holding element comprises a base region and two of which extends from the base area from extending foot areas, which: • are designed in a plate form, • in the mounting position of the retaining element parallel to the longitudinal axis, • located in the holding position of the holding element on two sides opposite the support rail, • in each case have a particularly edge-shaped edge area, wherein the peripheral regions are considered along the longitudinal axis, in order to separate a longitudinal distance (Δ) from each other, such that the rotation of the holding element is limited from the mounting position, in such a way that at least one of the peripheral regions in the system reaches at least one outside of the traverse. • are designed in a plate form, • in the mounting position of the retaining element parallel to the longitudinal axis, • located in the holding position of the holding element on two sides opposite the support rail, • in each case have a particularly edge-shaped edge area,