These motion sensor activated LED stair lights switch on automatically to light up your stairs when you reach the top or bottom step, and turns off when people leave. The package contains all the parts that you need, ready for quick and easy installation, even if you are not a professional installer, you can also install it easily. The number of step is adjustable, Brightness adjustable, Speed control, Delay time adjustable 3 lighting modes: 1- Cascade mode, 2- all lights on or off simultaneously mode, 3- Circular demo mode This Light Kit suitable for stair width minimum of 24", The LED light bar can be fixing with Double-sided adhesive and Metal clip. even if you are not a professional installer, you can also install it easily.