The night light is powered by 3 AA batteries (not included) operated, of course, corresponding rechargeable batteries can be used. Optionally, the night light can also be operated with an AC adapter (4.5V DC / min. 200 mW). The power consumption is in the manual with 0,003 W in standby mode, ie without light, indicated. Illuminates the part, it consumes 0.3 W, which is also a very small value. The motion sensor reacts very quickly, as the brightness sensor. The latter is pleasantly noticeable when you turn off the light at night in the corridor, the night light in immediately.
Nevertheless I subtract a star because me the angle of the motion sensor is too small. Especially in narrow long corridors you have to decide in which direction aligning the night light, so that it turns on itself. The other reason is the brightness sensor, also responded that, in my opinion, so if it's too early nor too light. So, the night light switches unfortunately even if the 3 LEDs the room can not also brighten.
But despite these two drawbacks, falling only slightly significant, this Nachtlich is highly recommended.
