Abstract: A luminaire and an illumination system are disclosed. In an embodiment a luminaire includes at least one light-emitting semiconductor chip having a main emission side and a reflector having a reflection side facing the main emission side, the reflection side being a freeform different from a circle, an ellipse, a parabola or a hyperbola when seen in cross-section, wherein a base line of the reflector runs through the main emission side and a local height of the reflection side is measured against the base line, wherein a local focal length of the reflection side is increased along the local height, concerning ray bundles coming in parallel with the base line from an exterior of the luminaire during operation, and wherein local heights do not have a common focal point.

Abstract: The lamp (2) contains a plurality of semiconductor light sources (21) as well as an electrical terminal node (22) and at least one electrical connection line (23). Said semiconductor light sources (21) are electrically connected with the terminal node (22) via the connection line (23). Electrical operating data of the semiconductor light sources (21) are saved in the terminal node (22). The semiconductor light sources (21) can be electrically activated independently of each other. In addition, the terminal node (22) is an electrically passive or active component.

Abstract: An illuminating device includes an illuminator with an illuminating mechanism. The illuminating mechanism includes several LEDs. The illuminating device is reversibly fixed by at least one holding device. The holding device includes a guiding device and a wing shaped unit. The wing shaped unit can be fixed and turned on the guiding device and can be guided along the guiding device. The holding device includes an unfolding mechanism. The wing shaped unit is oriented transverse to the guiding device by arranging the unfolding mechanism. The wing shaped unit is completely unfolded at a light emitting side. When the wing shaped unit is guided away from the light emitting side, the wing shaped unit is reversibly folded via a physical contact with a folding mechanism. The span of the light emitting side is greater than the span with the wing shaped unit being folded.