This is inexpensive,useful Xiaomi MiJIA IR Sensor is back on sale for 20 days.
Xiaomi Mijia IR Sensor and Photosensitive Night Light
1,120-degree sensing angle and sensing distance is up to 5 to 7 meters.
2,Advanced photosensitive sensor and human infrared sensor technology with anti-infrared interference function, the light can turn on automatically in the dark environment and light for 15 seconds
3,Extremely Low Power Consumption- The light comes with three AA batteries and is powered by batteries, free you from socket trouble. The choice of ultra-low power consumption of the sensing program ensures only 0.25mW power consumption when in standby mode. There are two brightness adjustments. when in 0.7Lm mode the battery can be used for about 12 months; when in 3.8Lm mode, can be used for about 6 months
Details:
Luminance: 0.7Lm
Optional Light Color: Warm White
Power Supply: Battery
Battery Type: 3xAA batteries
Input Voltage: DC 4.5V
Weight: 0.1410 kg
There's been plenty of better prices recently…
https://www.ozbargain.com.au/node/328682
https://www.ozbargain.com.au/node/328613
https://www.ozbargain.com.au/node/328495
Can you do a little better?