The Bioledex Mini recessed motion meets the requirement. As expected, he did not react at sufficiently high ambient light (daylight or normal indoor lighting), but only when it is dark. In addition, the duty cycle can be adjusted individually. The detection angle of 100 ° is sufficient for my purposes.
I drilled a hole with 12 mm diameter in my bedstead made of wood, at the appropriate place and put into this the sensor. So he is hardly noticeable. All the wiring was then carried out behind the bedstead. The whole I have mounted on both sides of the bed. Only the relay noise when turning, I find a bit annoying for my purposes. This could be regulated electronically in the low voltage area safe.
By the way, the supply was, although they did not take place directly from Amazon, very fast!