Light, in particular for a light strip consisting of a plurality of lights, - with a support rail which has a base profile from which two web profiles project so that the support rail has a U-shaped rail cross section, which has an open side opposite the base profile, - with a device carrier, which has a base profile and which can be mounted on the support rail so that the base profile closes the open side of the rail cross section, - wherein the web profiles at their end sections remote from the base profile each comprise a holding section which is formed on an inner side facing the other respective holding section as a holding contour, characterised in that - the base profile at its end sections laterally remote from one another has an edge section which is shaped on an outer side facing away from the other respective edge section as a locking contour, - the locking contours and the holding contours are shaped to be complementary to one another, - the locking contours and the holding contours can be adjusted to one another so that the device carrier when mounted on the support rail locks with the edge sections of its base profile on the holding sections of the web profiles, - in the engaged state the respective locking contour bears directly against the respective holding contour and with the latter by form-fitting forms a detachable locking connection between the support rail and device carrier, - the holding sections of the web profiles at their free ends each have an inwardly angled retaining collar, which with the adjoining area of the respective holding section encloses a retaining collar angle which is smaller than 90°, - the edge sections of the base profile at their free ends each have an inwardly angled locking collar, which with the adjoining area of the respective edge section encloses a locking collar angle which is smaller than 90°, - the respective locking collar in the engaged state bears with its outer side against an inner side of the respective retaining collar. - with a support rail which has a base profile from which two web profiles project so that the support rail has a U-shaped rail cross section, which has an open side opposite the base profile, - with a device carrier, which has a base profile and which can be mounted on the support rail so that the base profile closes the open side of the rail cross section, - wherein the web profiles at their end sections remote from the base profile each comprise a holding section which is formed on an inner side facing the other respective holding section as a holding contour, characterised in that - the base profile at its end sections laterally remote from one another has an edge section which is shaped on an outer side facing away from the other respective edge section as a locking contour, - the locking contours and the holding contours are shaped to be complementary to one another, - the locking contours and the holding contours can be adjusted to one another so that the device carrier when mounted on the support rail locks with the edge sections of its base profile on the holding sections of the web profiles, - in the engaged state the respective locking contour bears directly against the respective holding contour and with the latter by form-fitting forms a detachable locking connection between the support rail and device carrier, - the holding sections of the web profiles at their free ends each have an inwardly angled retaining collar, which with the adjoining area of the respective holding section encloses a retaining collar angle which is smaller than 90°, - the edge sections of the base profile at their free ends each have an inwardly angled locking collar, which with the adjoining area of the respective edge section encloses a locking collar angle which is smaller than 90°, - the respective locking collar in the engaged state bears with its outer side against an inner side of the respective retaining collar.