Abstract: A luminaire according to the invention has at least a number of illuminants and a reflection apparatus deflecting light radiation emitted by the illuminants into an illumination region, wherein a presence detection apparatus is assigned to the luminaire. In order to improve the control of every luminaire in view of the presence of a person and in order to further reduce the energy consumption, the reflection apparatus is, at least at points, embodied as a detection-reflection apparatus and electromagnetic detection radiation in particular is deflectable in the direction of the presence detection apparatus by way of the detection-reflection apparatus. The presence detection apparatus is arranged adjacent to the illuminants in the luminaire. The invention likewise relates to a method for presence detection, wherein electromagnetic detection radiation in particular is deflected in the direction of the present detection apparatus by way of a detection-reflection apparatus.

Abstract: A luminaire comprises at least one light emitting diode (LED) as a light source. Such LED comprises a limited light emitting angle for the emitted light radiation. Outside of the light emitting angle, an infrared sensor is assigned to the light source for detecting its temperature.

Abstract: A luminaire comprises at least one light emitting diode (LED) as a light source. Such LED has a limited light emitting angle for emitted light radiation. An infrared sensor is assigned to the light source for determining the temperature of same.

Abstract: The invention relates to an explosion-proof luminaire (1) comprising a luminaire housing (2), at least one light source (3) arranged in the luminaire housing (2), a reflective device (4) assigned to the light source (3) for deflecting light emitted by the light source (3) in the direction of a light exit opening (5) in the luminaire housing (2) and a cooling device (6) assigned to the light source (3) and/or the luminaire housing (2). In particular, an inner side (7) of the luminaire housing (2) is formed, at least pointwise, as a reflective device (4) and/or the cooling device (6) is formed in one piece with the luminaire housing (2).