You can build your own motion detection system to control your room lighting, using the FunHouse, LIFX WiFi light bulbs, and CircuitPython.
Set up a high tech night light. Or a darkroom warning light. Or a psychedelic chill-out zone. All of these things are possible with the mini PIR sensor that detects the presence of a person (or other large IR heat source) and flips the bulb to the color and brightness you decide.
Also uses the FunHouse buttons and display to pause and arm the system as well as to adjust the active timer.
LIFX WiFi Light Bulb
WiFi enabled, hub-less, color/color-temperature changing smart bulb by LIFX (there are other WiFi bulbs out there, but this project is specifically coded for LIFX brand bulbs).
Any of their bulbs will work, and you can modify the code to control multiple bulbs if you like.