Motion-activated LIFX lights with PIR/Ultrasonic sensors and a esp32 microcontroller.
Currently testing and working with both the TinyS3 and ProS3 boards but this should work with any wifi-enabled board with some basic GPIO.
https://esp32s3.com/tinys3.html
https://esp32s3.com/pros3.html
There is a python version of this project written with Raspberry Pi in mind: https://github.com/chrisjtwomey/rpi-motion-lifx
Parts files for printing the housing yourself can be found here https://www.printables.com/model/435337-hc-sr04-hc-sr501-casing-angle-adjustable-cradle