Holding device, comprising - a support rail extending along a longitudinal axis (L) 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 (R) perpendicular to the longitudinal axis (L), - 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 (R), 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 (L), • 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 (L), 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 (L) 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 (R) perpendicular to the longitudinal axis (L), - 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 (R), 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 (L), • 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 (L), 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 (L), • 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 , <EOS>