Cheapest it has ever been.
Practical lighting that is automated is now available with the Osram LED Spylux. Mountable just about anywhere, the Spylux uses a motion sensor to operate the light automatically when you enter the sensor radius. The Spylux provides sufficient light for any task needed to be done, and will turn off automatically after an elapsed time.
Install: easily by mounting the magnetic base plate onto the wall or surface
3 LED: system for bright, clear lighting
Tilt able Lighting: allows you to light either more of the floor, or more of the room (25 degrees motion vertical / 70 degrees motion horizontal)
Sensor: motion sensor turns the light on when movement within a 4m radius is detected
Timer: turns off after min
Battery: powered; 3 x AAA (included)