A luminaire comprising; - a light source, the light source further comprising a light emitting surface, - an optical element being configured to obtain a skylight appearance including a direct sunlight effect or a bluish light emission, said optical element comprising - a first plate which is to be arranged parallel to the light emitting surface, the first plate being opaque and further comprising - a first side facing the ambient, and - a second side being opposite the first side, the second side arranged parallel to the light emitting surface, the second side for receiving light from the light source and being a reflective surface, the reflective surface being light reflective in a predetermined spectral range for obtaining a blue light emission, and - a second plate arranged parallel to the first plate and being separated from the first plate by a gap, the second plate comprising a further reflective surface, the reflective surface of the first plate facing the further reflective surface of the second plate, wherein each of the first plate and second plate comprises a plurality of holes (412, 416, 418, 422), and multiple holes (412, 416) of the first plate form a pair with a nearest hole (418, 422) in the second plate, and a line through a central point of the holes (412, 416, 418, 422) of the pair forms an imaginary central axis of the pair (414, 424), all imaginary central axes of pairs (414, 424) are arranged in parallel and the pairs of holes (412, 416, 418, 422) are arranged to collimate a part of the light received from the light source to obtain a collimated light beam in a direction of the imaginary central axes of pairs (414, 424), each pair of holes (412, 416, 418, 422) forming one of a plurality of collimating means for obtaining a collimated light beam in a specific direction by transmitting a part of the light received from the light source, which part has a light emission angle substantially in the specific direction. - a light source, the light source further comprising a light emitting surface, - an optical element being configured to obtain a skylight appearance including a direct sunlight effect or a bluish light emission, said optical element comprising - a first plate which is to be arranged parallel to the light emitting surface, the first plate being opaque and further comprising - a first plate which is to be arranged parallel to the light emitting surface, the first plate being opaque and further comprising - a first side facing the ambient, and - a second side being opposite the first side, the second side arranged parallel to the light emitting surface, the second side for receiving light from the light source and being a reflective surface, the reflective surface being light reflective in a predetermined spectral range for obtaining a blue light emission, and - a second plate arranged parallel to the first plate and being separated from the first plate by a gap, the second plate comprising a further reflective surface, the reflective surface of the first plate facing the further reflective surface of the second plate, - a second plate arranged parallel to the first plate and being separated from the first plate by a gap, the second plate comprising a further reflective surface, the reflective surface of the first plate facing the further reflective surface of the second plate,